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Posted to commits@isis.apache.org by ah...@apache.org on 2018/05/19 17:14:03 UTC

[isis] 05/05: ISIS-1949: Aligning Internal API package names with new home 'commons'

This is an automated email from the ASF dual-hosted git repository.

ahuber pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/isis.git

commit 963c08c7bab5c9a4cd79f426a2abc2dccb8e3817
Author: Andi Huber <ah...@apache.org>
AuthorDate: Sat May 19 19:11:59 2018 +0200

    ISIS-1949: Aligning Internal API package names with new home 'commons'
    
    ... org.apache.isis.commons.internal.*
    
    Task-Url: https://issues.apache.org/jira/browse/ISIS-1949
---
 .../java/org/apache/isis/applib/util/Clause.java   |  2 +-
 .../isis/applib/util/ObjectContractsLegacy.java    |  8 +++----
 ...ectContractsLegacyTest_equals_and_hashCode.java |  2 +-
 .../apache/isis/applib/AppManifestAbstract.java    |  4 ++--
 .../java/org/apache/isis/applib/Identifier.java    |  4 ++--
 .../main/java/org/apache/isis/applib/Module.java   |  6 ++---
 .../org/apache/isis/applib/ModuleAbstract.java     |  4 ++--
 .../isis/applib/ModuleOrBuilderAbstract.java       |  6 ++---
 .../isis/applib/NonRecoverableException.java       |  2 +-
 .../apache/isis/applib/RecoverableException.java   |  4 ++--
 .../isis/applib/annotation/MemberGroupLayout.java  |  2 +-
 .../isis/applib/domain/DomainObjectList.java       |  2 +-
 .../applib/events/domain/AbstractDomainEvent.java  |  4 ++--
 .../isis/applib/events/ui/AbstractUiEvent.java     |  2 +-
 .../apache/isis/applib/fixtures/LogonFixture.java  |  2 +-
 .../fixturescripts/BuilderScriptAbstract.java      |  2 +-
 .../applib/fixturescripts/ExecutionParameters.java |  6 ++---
 .../applib/fixturescripts/FixtureResultList.java   |  6 ++---
 .../isis/applib/fixturescripts/FixtureScript.java  | 10 ++++----
 .../isis/applib/fixturescripts/FixtureScripts.java |  6 ++---
 .../setup/PersonaEnumPersistAll.java               |  2 +-
 .../teardown/TeardownFixtureAbstract.java          |  2 +-
 .../teardown/TeardownFixtureAbstract2.java         |  2 +-
 .../layout/component/CollectionLayoutData.java     |  2 +-
 .../isis/applib/layout/component/FieldSet.java     |  2 +-
 .../layout/component/PropertyLayoutData.java       |  2 +-
 .../isis/applib/layout/grid/GridAbstract.java      |  4 ++--
 .../isis/applib/layout/grid/bootstrap3/BS3Col.java |  2 +-
 .../applib/layout/grid/bootstrap3/BS3Grid.java     |  4 ++--
 .../isis/applib/layout/grid/bootstrap3/BS3Row.java |  2 +-
 .../isis/applib/layout/grid/bootstrap3/BS3Tab.java |  2 +-
 .../applib/layout/grid/bootstrap3/BS3TabGroup.java |  2 +-
 .../applib/layout/menubars/MenuBarsAbstract.java   |  2 +-
 .../applib/layout/menubars/bootstrap3/BS3Menu.java |  2 +-
 .../layout/menubars/bootstrap3/BS3MenuBar.java     |  2 +-
 .../layout/menubars/bootstrap3/BS3MenuBars.java    |  2 +-
 .../layout/menubars/bootstrap3/BS3MenuSection.java |  2 +-
 .../isis/applib/mixins/dto/DtoMappingHelper.java   |  2 +-
 .../mixins/layout/Object_downloadLayoutXml.java    |  2 +-
 .../applib/mixins/layout/Object_openRestApi.java   |  2 +-
 .../apache/isis/applib/query/QueryAbstract.java    |  2 +-
 .../services/appfeat/ApplicationMemberType.java    |  2 +-
 .../isis/applib/services/bookmark/Bookmark.java    |  4 ++--
 .../applib/services/bookmark/BookmarkService.java  |  2 +-
 .../ClassDiscoveryServiceDefault.java              |  4 ++--
 .../applib/services/command/CommandDefault.java    |  4 ++--
 .../services/config/ConfigurationProperty.java     |  6 ++---
 .../services/conmap/ContentMappingService.java     |  2 +-
 .../services/eventbus/EventBusImplementation.java  |  2 +-
 .../applib/services/eventbus/EventBusService.java  |  2 +-
 .../exceprecog/ExceptionRecognizerAbstract.java    |  2 +-
 .../exceprecog/ExceptionRecognizerComposite.java   |  2 +-
 .../exceprecog/ExceptionRecognizerForType.java     |  2 +-
 ...eptionRecognizerCompositeForJdoObjectStore.java |  2 +-
 .../applib/services/hsqldb/HsqlDbManagerMenu.java  |  4 ++--
 .../applib/services/i18n/TranslatableString.java   |  2 +-
 .../isis/applib/services/iactn/Interaction.java    |  4 ++--
 .../jaxb/CatalogingSchemaOutputResolver.java       |  4 ++--
 .../isis/applib/services/jaxb/JaxbService.java     |  6 ++---
 .../applib/services/layout/LayoutServiceMenu.java  |  2 +-
 .../services/metamodel/MetaModelServicesMenu.java  |  2 +-
 .../QueryResultsCacheInternal.java                 |  4 ++--
 .../applib/services/scratchpad/Scratchpad.java     |  2 +-
 .../services/swagger/SwaggerServiceMenu.java       |  2 +-
 .../services/urlencoding/UrlEncodingService.java   |  4 ++--
 ...rlEncodingServiceUsingBaseEncodingAbstract.java |  4 ++--
 .../UrlEncodingServiceWithCompression.java         |  4 ++--
 .../isis/applib/spec/AbstractSpecification2.java   |  2 +-
 .../org/apache/isis/applib/tree/LazyTreeNode.java  |  4 ++--
 .../java/org/apache/isis/applib/tree/TreeNode.java |  2 +-
 .../java/org/apache/isis/applib/util/Enums.java    |  2 +-
 .../java/org/apache/isis/applib/util/Equality.java |  4 ++--
 .../java/org/apache/isis/applib/util/Hashing.java  |  2 +-
 .../java/org/apache/isis/applib/util/JaxbUtil.java |  6 ++---
 .../isis/applib/util/ObjectContract_Parser.java    |  4 ++--
 .../apache/isis/applib/util/ObjectContracts.java   |  4 ++--
 .../org/apache/isis/applib/util/TitleBuffer.java   |  2 +-
 .../java/org/apache/isis/applib/util/ToString.java |  2 +-
 .../apache/isis/schema/utils/ChangesDtoUtils.java  |  3 +--
 .../apache/isis/schema/utils/CommandDtoUtils.java  |  2 +-
 .../apache/isis/schema/utils/CommonDtoUtils.java   | 12 +++++-----
 .../isis/schema/utils/InteractionDtoUtils.java     |  6 ++---
 .../isis/schema/utils/MemberExecutionDtoUtils.java |  2 +-
 .../jaxbadapters/PersistentEntitiesAdapter.java    |  2 +-
 .../Module_Util_transitiveDependenciesOf_Test.java |  4 ++--
 .../isis/applib/internal/base/BytesTest.java       |  4 +++-
 .../isis/applib/internal/base/NullSafeTest.java    |  2 ++
 .../isis/applib/internal/base/ReductionTest.java   |  3 ++-
 .../isis/applib/internal/base/StringsTest.java     |  4 +++-
 .../applib/internal/compare/ComparatorsTest.java   |  3 ++-
 .../isis/applib/internal/memento/MementosTest.java |  7 +++---
 ...onRecognizerCompositeForJdoObjectStoreTest.java |  2 +-
 .../XmlSnapshotServiceAbstractTest.java            |  2 +-
 .../ObjectContractsTest_equals_and_hashCode.java   |  2 +-
 .../applib/internal/exceptions/package-info.java   | 28 ----------------------
 .../applib/internal/functions/package-info.java    | 28 ----------------------
 .../isis/applib/internal/memento/package-info.java | 28 ----------------------
 .../applib/internal/resources/package-info.java    | 28 ----------------------
 .../{applib => commons}/internal/_Constants.java   |  2 +-
 .../{applib => commons}/internal/base/_Bytes.java  |  2 +-
 .../internal/base/_Bytes_GZipCompressor.java       |  2 +-
 .../internal/base/_Bytes_GZipCompressorSmart.java  |  4 ++--
 .../{applib => commons}/internal/base/_Casts.java  |  2 +-
 .../{applib => commons}/internal/base/_Lazy.java   |  2 +-
 .../internal/base/_NullSafe.java                   |  2 +-
 .../internal/base/_Reduction.java                  |  2 +-
 .../internal/base/_Strings.java                    |  8 +++----
 .../internal/base/_Strings_NaturalNames.java       |  2 +-
 .../internal/base/_Strings_SplitIterator.java      |  2 +-
 .../internal/base/package-info.java                |  2 +-
 .../internal/collections/_Arrays.java              |  8 +++----
 .../internal/collections/_Arrays_Collector.java    |  4 ++--
 .../collections/_Arrays_CollectorUnknownSize.java  |  4 ++--
 .../internal/collections/_Collections.java         |  4 ++--
 .../collections/_Collections_Collector.java        |  2 +-
 .../collections/_Collections_SortedSetOfList.java  |  2 +-
 .../internal/collections/_Lists.java               |  4 ++--
 .../internal/collections/_Maps.java                |  2 +-
 .../internal/collections/_Multimaps.java           |  2 +-
 .../internal/collections/_Sets.java                |  4 ++--
 .../internal/collections}/package-info.java        |  2 +-
 .../internal/compare/_Comparators.java             |  2 +-
 .../compare/_Comparators_SequenceCompare.java      |  4 ++--
 .../internal/compare}/package-info.java            |  2 +-
 .../internal/context/_Context.java                 |  8 +++----
 .../internal/context/_Plugin.java                  |  6 ++---
 .../internal/context/package-info.java             |  2 +-
 .../internal/discover/_Discover.java               |  4 ++--
 .../internal/discover}/package-info.java           |  2 +-
 .../internal/exceptions/_Exceptions.java           |  6 ++---
 .../internal/exceptions}/package-info.java         |  2 +-
 .../internal/functions/_Functions.java             |  2 +-
 .../_Functions_IndexAwareFunctionAdapter.java      |  4 ++--
 .../internal/functions}/package-info.java          |  2 +-
 .../internal/memento/_Mementos.java                |  2 +-
 .../internal/memento/_Mementos_MementoDefault.java | 18 +++++++-------
 .../internal/memento}/package-info.java            |  2 +-
 .../{applib => commons}/internal/package-info.java |  2 +-
 .../internal/resources/_Resource.java              |  8 +++----
 .../internal/resources/_Resource_ContextPath.java  |  2 +-
 .../internal/resources/_Resource_Path.java         |  4 ++--
 .../internal/resources/_Resource_RestfulPath.java  |  2 +-
 .../internal/resources}/package-info.java          |  2 +-
 .../core/plugins/codegen/ProxyFactoryPlugin.java   |  2 +-
 .../integtestsupport/IntegrationTestAbstract.java  |  2 +-
 .../integtestsupport/IntegrationTestAbstract3.java |  2 +-
 .../core/integtestsupport/IsisSystemForTest.java   |  4 ++--
 .../core/integtestsupport/ThrowableMatchers.java   |  2 +-
 .../scenarios/ObjectFactoryForIntegration.java     |  2 +-
 .../RepositoryServiceLegacyInternalDefault.java    |  2 +-
 .../isis/core/commons/encoding/FieldType.java      |  2 +-
 .../core/commons/exceptions/ExceptionUtils.java    |  2 +-
 .../isis/core/commons/factory/InstanceUtil.java    |  2 +-
 .../apache/isis/core/commons/lang/ClassUtil.java   |  2 +-
 .../commons/lang/MethodInvocationPreprocessor.java |  8 +++----
 .../isis/core/commons/lang/ObjectExtensions.java   |  2 +-
 .../isis/core/commons/lang/ResourceUtil.java       |  2 +-
 .../isis/core/commons/lang/StringExtensions.java   |  2 +-
 ...ResourceStreamSourceContextLoaderClassPath.java |  2 +-
 .../core/metamodel/IsisJdoMetamodelPlugin.java     |  2 +-
 .../isis/core/metamodel/adapter/ObjectAdapter.java |  2 +-
 .../isis/core/metamodel/adapter/oid/Oid.java       |  2 +-
 .../isis/core/metamodel/facetapi/FacetUtil.java    |  4 ++--
 .../core/metamodel/facets/CollectionUtils.java     | 10 ++++----
 .../isis/core/metamodel/facets/FacetedMethod.java  |  2 +-
 ...rCollectionIdentifyingFacetFactoryAbstract.java |  2 +-
 .../facets/actcoll/typeof/TypeOfFacet.java         |  4 ++--
 .../action/ActionAnnotationFacetFactory.java       |  2 +-
 ...ctionInvocationFacetForDomainEventAbstract.java |  2 +-
 .../actions/action/invocation/CommandUtil.java     |  4 ++--
 .../ActionDefaultsFacetViaMethodFactory.java       |  2 +-
 .../CollectionAccessorFacetViaAccessor.java        |  2 +-
 .../CollectionAnnotationFacetFactory.java          |  2 +-
 .../javautilcollection/CollectionFacetFactory.java |  4 ++--
 .../choices/ChoicesFacetFromBoundedAbstract.java   |  4 ++--
 .../AuditableFacetForDomainObjectAnnotation.java   |  2 +-
 ...lishedObjectFacetForDomainObjectAnnotation.java |  2 +-
 .../domainservice/DomainServiceMenuOrder.java      |  2 +-
 .../ignore/javalang/RemoveMethodsFacetFactory.java |  2 +-
 .../MemberGroupLayoutFacetProperties.java          |  2 +-
 .../NavigableParentAnnotationFacetFactory.java     |  2 +-
 ...ObjectFacetDeclarativeInitializingAbstract.java |  4 ++--
 .../ActionParameterAutoCompleteFacetViaMethod.java |  4 ++--
 ...rameterChoicesFacetDerivedFromChoicesFacet.java |  2 +-
 .../method/ActionChoicesFacetViaMethod.java        |  2 +-
 .../method/ActionChoicesFacetViaMethodFactory.java |  2 +-
 .../ActionParameterChoicesFacetViaMethod.java      |  4 ++--
 ...cetInvertedByNullableAnnotationOnParameter.java |  2 +-
 .../method/PropertyAutoCompleteFacetMethod.java    |  2 +-
 ...ropertyChoicesFacetDerivedFromChoicesFacet.java |  2 +-
 .../ValueSemanticsProviderAbstractTemporal.java    |  2 +-
 .../JavaSqlTimeStampValueSemanticsProvider.java    |  2 +-
 .../treenode/TreeNodeValueSemanticsProvider.java   |  6 ++---
 .../MemberOrderFacetComparator.java                |  2 +-
 .../progmodel/ProgrammingModelPlugin.java          |  4 ++--
 .../core/metamodel/services/ServicesInjector.java  | 12 +++++-----
 .../bookmarks/BookmarkServiceInternalDefault.java  |  8 +++----
 .../config/ConfigurationServiceDefault.java        |  6 ++---
 .../factory/FactoryServiceInternalDefault.java     |  2 +-
 .../services/grid/GridLoaderServiceDefault.java    |  2 +-
 .../RepositoryServiceInternalDefault.java          |  2 +-
 .../services/swagger/SwaggerServiceDefault.java    |  4 ++--
 .../swagger/internal/ValuePropertyFactory.java     |  2 +-
 .../swagger/internal/ValuePropertyPlugin.java      |  2 +-
 .../core/metamodel/spec/feature/ObjectAction.java  |  4 ++--
 .../core/metamodel/specloader/CollectionUtils.java |  4 ++--
 .../specloader/specimpl/ObjectActionDefault.java   |  4 ++--
 .../specimpl/OneToOneAssociationDefault.java       |  2 +-
 .../core/metamodel/util/DeweyOrderComparator.java  |  2 +-
 .../core/runtime/threadpool/ThreadPoolSupport.java |  4 ++--
 .../dflt/ProgrammingModelFacetsJava5.java          |  2 +-
 .../apache/isis/core/metamodel/facets/Utils.java   |  2 +-
 .../codegen/ProxyFactoryPluginUsingByteBuddy.java  |  2 +-
 .../codegen/ProxyFactoryPluginUsingJavassist.java  |  6 ++---
 .../ClassDiscoveryPluginUsingReflections.java      |  2 +-
 .../reflections/ReflectDiscovery.java              |  2 +-
 .../system/persistence/PersistenceSession4.java    |  4 ++--
 .../persistence/spi/JdoObjectIdSerializer.java     |  2 +-
 .../system/persistence/PersistenceSession5.java    |  6 ++---
 .../persistence/spi/JdoObjectIdSerializer.java     |  2 +-
 .../isis/core/metamodel/IsisJdoRuntimePlugin.java  |  2 +-
 .../apache/isis/core/runtime/memento/Memento.java  |  2 +-
 .../core/runtime/services/ServiceInstantiator.java |  2 +-
 .../services/ServicesInstallerFromAnnotation.java  |  2 +-
 .../background/BackgroundServiceDefault.java       |  4 ++--
 .../core/runtime/system/context/IsisContext.java   |  2 +-
 .../system/persistence/PersistenceSessionBase.java |  4 ++--
 .../system/session/IsisSessionFactoryBuilder.java  |  2 +-
 .../IsisComponentProvider.java                     |  2 +-
 .../PersistenceCapableTypeFinder.java              |  2 +-
 .../scenarios/ScenarioExecutionScope.java          |  2 +-
 .../core/specsupport/specs/CukeGlueAbstract.java   |  2 +-
 .../restfulobjects/applib/JsonRepresentation.java  |  6 ++---
 .../applib/client/RestfulResponse.java             |  2 +-
 .../applib/client/UriBuilderPlugin.java            |  2 +-
 .../restfulobjects/applib/util/MediaTypes.java     |  2 +-
 .../viewer/restfulobjects/applib/util/Parser.java  |  8 +++----
 .../restfulobjects/applib/util/PathNode.java       |  6 ++---
 .../applib/util/UrlEncodingUtils.java              |  4 ++--
 .../server/IsisJaxrsServerPlugin.java              |  2 +-
 .../server/RestfulObjectsApplication.java          |  2 +-
 .../wicket/viewer/IsisWicketApplication.java       |  6 ++---
 .../ComponentFactoryRegistrarDefault.java          |  2 +-
 .../model/mementos/ObjectAdapterMemento.java       |  2 +-
 .../viewer/wicket/model/models/ActionModel.java    |  2 +-
 .../wicket/model/models/EntityCollectionModel.java |  6 ++---
 .../viewer/wicket/model/models/ScalarModel.java    |  2 +-
 .../isis/viewer/wicket/model/models/Util.java      |  2 +-
 .../wicket/model/models/WicketComponentUtils.java  |  2 +-
 .../ui/components/about/JarManifestModel.java      |  2 +-
 .../collection/bulk/BulkActionsLinkFactory.java    |  4 ++--
 .../wicket/ui/components/layout/bs3/col/Col.java   |  2 +-
 .../components/layout/bs3/tabs/TabGroupPanel.java  |  2 +-
 .../components/scalars/IsisConverterLocator.java   |  6 ++---
 .../scalars/reference/ReferencePanel.java          |  2 +-
 .../valuechoices/ValueChoicesSelect2Panel.java     |  2 +-
 .../components/tree/IsisToWicketTreeAdapter.java   |  4 ++--
 .../ui/components/widgets/navbar/Placement.java    |  2 +-
 ...entoProviderForReferenceObjectAutoComplete.java |  2 +-
 ...derForReferenceParamOrPropertyAutoComplete.java |  2 +-
 .../handlers/DomainObjectInvocationHandler.java    |  2 +-
 .../isis/core/wrapper/proxy/ProxyCreator.java      |  4 ++--
 262 files changed, 412 insertions(+), 516 deletions(-)

diff --git a/core/applib-legacy/src/main/java/org/apache/isis/applib/util/Clause.java b/core/applib-legacy/src/main/java/org/apache/isis/applib/util/Clause.java
index cd74311..e718aab 100644
--- a/core/applib-legacy/src/main/java/org/apache/isis/applib/util/Clause.java
+++ b/core/applib-legacy/src/main/java/org/apache/isis/applib/util/Clause.java
@@ -23,7 +23,7 @@ import java.util.Comparator;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 
 class Clause {
     private static Pattern pattern = Pattern.compile("\\W*(\\w+)\\W*(asc|asc nullsFirst|asc nullsLast|desc|desc nullsFirst|desc nullsLast)?\\W*");
diff --git a/core/applib-legacy/src/main/java/org/apache/isis/applib/util/ObjectContractsLegacy.java b/core/applib-legacy/src/main/java/org/apache/isis/applib/util/ObjectContractsLegacy.java
index ce0a29f..02af346 100644
--- a/core/applib-legacy/src/main/java/org/apache/isis/applib/util/ObjectContractsLegacy.java
+++ b/core/applib-legacy/src/main/java/org/apache/isis/applib/util/ObjectContractsLegacy.java
@@ -21,10 +21,10 @@ import java.util.Comparator;
 import java.util.List;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Lists;
 
 import com.google.common.base.Function;
 import com.google.common.base.Objects;
diff --git a/core/applib-legacy/src/test/java/org/apache/isis/applib/util/ObjectContractsLegacyTest_equals_and_hashCode.java b/core/applib-legacy/src/test/java/org/apache/isis/applib/util/ObjectContractsLegacyTest_equals_and_hashCode.java
index a84e6cd..445e059 100644
--- a/core/applib-legacy/src/test/java/org/apache/isis/applib/util/ObjectContractsLegacyTest_equals_and_hashCode.java
+++ b/core/applib-legacy/src/test/java/org/apache/isis/applib/util/ObjectContractsLegacyTest_equals_and_hashCode.java
@@ -18,7 +18,7 @@ package org.apache.isis.applib.util;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.unittestsupport.value.ValueTypeContractTestAbstract;
 import org.junit.Before;
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/AppManifestAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/AppManifestAbstract.java
index 86bf441..965bb52 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/AppManifestAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/AppManifestAbstract.java
@@ -24,8 +24,8 @@ import java.util.Map;
 import java.util.Set;
 
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 
 /**
  * Convenience adapter, configured using an {@link Builder}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/Identifier.java b/core/applib/src/main/java/org/apache/isis/applib/Identifier.java
index 3d2b989..65c1a6b 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/Identifier.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/Identifier.java
@@ -25,8 +25,8 @@ import java.util.List;
 import java.util.StringTokenizer;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
 
 public class Identifier implements Comparable<Identifier> {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/Module.java b/core/applib/src/main/java/org/apache/isis/applib/Module.java
index 01c2fc9..f960439 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/Module.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/Module.java
@@ -25,9 +25,9 @@ import java.util.Set;
 
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.collections._Sets;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Sets;
 
 /**
  * Represents a collection of entities and domain services that provide a set of coherent functionality under a
diff --git a/core/applib/src/main/java/org/apache/isis/applib/ModuleAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/ModuleAbstract.java
index d5d63b6..b9b7fe0 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/ModuleAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/ModuleAbstract.java
@@ -27,8 +27,8 @@ import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlTransient;
 
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Sets;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Sets;
 
 /**
  * Adapter for {@link Module} which has a default no-op implementation.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/ModuleOrBuilderAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/ModuleOrBuilderAbstract.java
index 479d0fd..527951e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/ModuleOrBuilderAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/ModuleOrBuilderAbstract.java
@@ -26,9 +26,9 @@ import java.util.Set;
 
 import javax.xml.bind.annotation.XmlTransient;
 
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.collections._Sets;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Sets;
 
 /**
  * Factors out the commonality between {@link AppManifestAbstract.Builder} and {@link ModuleAbstract}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/NonRecoverableException.java b/core/applib/src/main/java/org/apache/isis/applib/NonRecoverableException.java
index f59b1fb7..8620703 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/NonRecoverableException.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/NonRecoverableException.java
@@ -19,9 +19,9 @@
 
 package org.apache.isis.applib;
 
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.services.exceprecog.TranslatableException;
 import org.apache.isis.applib.services.i18n.TranslatableString;
+import org.apache.isis.commons.internal.base._Strings;
 
 /**
  * Indicates that an unexpected, non-recoverable (fatal) exception has occurred within
diff --git a/core/applib/src/main/java/org/apache/isis/applib/RecoverableException.java b/core/applib/src/main/java/org/apache/isis/applib/RecoverableException.java
index da962e1..274266a 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/RecoverableException.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/RecoverableException.java
@@ -19,10 +19,10 @@
 
 package org.apache.isis.applib;
 
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.exceprecog.TranslatableException;
 import org.apache.isis.applib.services.i18n.TranslatableString;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 /**
  * Indicates that an exceptional condition/problem has occurred within the application's domain logic.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/annotation/MemberGroupLayout.java b/core/applib/src/main/java/org/apache/isis/applib/annotation/MemberGroupLayout.java
index d072cc0..c31ccae 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/annotation/MemberGroupLayout.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/annotation/MemberGroupLayout.java
@@ -28,7 +28,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 
 /**
  * Specifies the positioning of an entity's (groups of) properties and of its collections, on a page, column by column.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/domain/DomainObjectList.java b/core/applib/src/main/java/org/apache/isis/applib/domain/DomainObjectList.java
index 5d76466..cbc29ad 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/domain/DomainObjectList.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/domain/DomainObjectList.java
@@ -32,7 +32,7 @@ import org.apache.isis.applib.annotation.Editing;
 import org.apache.isis.applib.annotation.Nature;
 import org.apache.isis.applib.annotation.Optionality;
 import org.apache.isis.applib.annotation.Property;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.schema.utils.jaxbadapters.PersistentEntitiesAdapter;
 
 @XmlRootElement(name = "list")
diff --git a/core/applib/src/main/java/org/apache/isis/applib/events/domain/AbstractDomainEvent.java b/core/applib/src/main/java/org/apache/isis/applib/events/domain/AbstractDomainEvent.java
index 2af8347..b5f8bb9 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/events/domain/AbstractDomainEvent.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/events/domain/AbstractDomainEvent.java
@@ -23,11 +23,11 @@ import java.util.Map;
 
 import org.apache.isis.applib.Identifier;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.i18n.TranslatableString;
 import org.apache.isis.applib.util.ObjectContracts;
 import org.apache.isis.applib.util.ToString;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 public abstract class AbstractDomainEvent<S> extends java.util.EventObject {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/events/ui/AbstractUiEvent.java b/core/applib/src/main/java/org/apache/isis/applib/events/ui/AbstractUiEvent.java
index 274ab7f..385bb1e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/events/ui/AbstractUiEvent.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/events/ui/AbstractUiEvent.java
@@ -21,9 +21,9 @@ package org.apache.isis.applib.events.ui;
 import java.util.EventObject;
 import java.util.Map;
 
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.util.ObjectContracts;
 import org.apache.isis.applib.util.ToString;
+import org.apache.isis.commons.internal.collections._Maps;
 
 public abstract class AbstractUiEvent<S> extends EventObject {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixtures/LogonFixture.java b/core/applib/src/main/java/org/apache/isis/applib/fixtures/LogonFixture.java
index b0b9c0b..43b8abd 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixtures/LogonFixture.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixtures/LogonFixture.java
@@ -22,7 +22,7 @@ package org.apache.isis.applib.fixtures;
 import java.util.List;
 
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Indicates that the demo or test should be run as the specified user, with the
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/BuilderScriptAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/BuilderScriptAbstract.java
index 2dd8260..d15aa8a 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/BuilderScriptAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/BuilderScriptAbstract.java
@@ -21,7 +21,7 @@ package org.apache.isis.applib.fixturescripts;
 import java.util.List;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 public abstract class BuilderScriptAbstract<T,F extends BuilderScriptAbstract<T,F>>
         extends FixtureScript implements WithPrereqs<T,F>, FixtureScriptWithExecutionStrategy {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java
index ae0d08a..2b34087 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java
@@ -25,9 +25,9 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.joda.time.DateTime;
 import org.joda.time.LocalDate;
 import org.joda.time.LocalDateTime;
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResultList.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResultList.java
index 90a45c0..46e8089 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResultList.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResultList.java
@@ -23,9 +23,9 @@ import java.util.List;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 
 /**
  * Collecting parameter.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScript.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScript.java
index 80780f3..d72bde8 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScript.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScript.java
@@ -35,11 +35,6 @@ import org.apache.isis.applib.annotation.ViewModelLayout;
 import org.apache.isis.applib.annotation.Where;
 import org.apache.isis.applib.fixtures.FixtureType;
 import org.apache.isis.applib.fixtures.InstallableFixture;
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.factory.FactoryService;
 import org.apache.isis.applib.services.registry.ServiceRegistry;
 import org.apache.isis.applib.services.repository.RepositoryService;
@@ -47,6 +42,11 @@ import org.apache.isis.applib.services.sessmgmt.SessionManagementService;
 import org.apache.isis.applib.services.user.UserService;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
 import org.apache.isis.applib.services.xactn.TransactionService;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.joda.time.LocalDate;
 import org.joda.time.LocalDateTime;
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScripts.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScripts.java
index 7cfefec..a78f90e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScripts.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureScripts.java
@@ -40,9 +40,6 @@ import org.apache.isis.applib.annotation.Parameter;
 import org.apache.isis.applib.annotation.ParameterLayout;
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.applib.annotation.RestrictTo;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.services.classdiscovery.ClassDiscoveryService;
 import org.apache.isis.applib.services.factory.FactoryService;
@@ -53,6 +50,9 @@ import org.apache.isis.applib.services.registry.ServiceRegistry;
 import org.apache.isis.applib.services.repository.RepositoryService;
 import org.apache.isis.applib.services.title.TitleService;
 import org.apache.isis.applib.services.xactn.TransactionService;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 
 /**
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java
index f4fbe03..4c4ec5e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java
@@ -25,7 +25,7 @@ import org.apache.isis.applib.fixturescripts.FixtureScript;
 import org.apache.isis.applib.fixturescripts.FixtureScriptWithExecutionStrategy;
 import org.apache.isis.applib.fixturescripts.FixtureScripts;
 import org.apache.isis.applib.fixturescripts.PersonaWithBuilderScript;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 public class PersonaEnumPersistAll<E extends Enum<E> & PersonaWithBuilderScript<T,F>, T, F extends BuilderScriptAbstract<T,F>>
         extends FixtureScript
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract.java
index 8c16f2d..3792802 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract.java
@@ -22,8 +22,8 @@ import javax.inject.Inject;
 import javax.jdo.metadata.TypeMetadata;
 
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.services.jdosupport.IsisJdoSupport;
+import org.apache.isis.commons.internal.base._Strings;
 
 public abstract class TeardownFixtureAbstract extends FixtureScript {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract2.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract2.java
index 13d5c74..d637126 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract2.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/teardown/TeardownFixtureAbstract2.java
@@ -26,8 +26,8 @@ import javax.jdo.metadata.DiscriminatorMetadata;
 import javax.jdo.metadata.InheritanceMetadata;
 import javax.jdo.metadata.TypeMetadata;
 
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.services.jdosupport.IsisJdoSupport;
+import org.apache.isis.commons.internal.base._Strings;
 
 public abstract class TeardownFixtureAbstract2 extends TeardownFixtureAbstract {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/component/CollectionLayoutData.java b/core/applib/src/main/java/org/apache/isis/applib/layout/component/CollectionLayoutData.java
index 086e2e2..55d7538 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/component/CollectionLayoutData.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/component/CollectionLayoutData.java
@@ -28,8 +28,8 @@ import javax.xml.bind.annotation.XmlTransient;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.links.Link;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Describes the layout of a single collection, broadly corresponds to the {@link org.apache.isis.applib.annotation.CollectionLayout} annotation.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/component/FieldSet.java b/core/applib/src/main/java/org/apache/isis/applib/layout/component/FieldSet.java
index 5045604..efb065f 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/component/FieldSet.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/component/FieldSet.java
@@ -28,8 +28,8 @@ import javax.xml.bind.annotation.XmlTransient;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.MemberOrder;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.grid.bootstrap3.BS3Col;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * A {@link MemberRegion region} of the page containing a set of
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/component/PropertyLayoutData.java b/core/applib/src/main/java/org/apache/isis/applib/layout/component/PropertyLayoutData.java
index 1c28eda..2203326 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/component/PropertyLayoutData.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/component/PropertyLayoutData.java
@@ -32,8 +32,8 @@ import org.apache.isis.applib.annotation.PromptStyle;
 import org.apache.isis.applib.annotation.RenderDay;
 import org.apache.isis.applib.annotation.Repainting;
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.links.Link;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Describes the layout of a single property, broadly corresponds to the {@link org.apache.isis.applib.annotation.PropertyLayout} annotation.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/GridAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/GridAbstract.java
index 77f529c..cb898ad 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/GridAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/GridAbstract.java
@@ -24,8 +24,6 @@ import java.util.List;
 import javax.xml.bind.annotation.XmlTransient;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.layout.component.ActionLayoutData;
 import org.apache.isis.applib.layout.component.ActionLayoutDataOwner;
 import org.apache.isis.applib.layout.component.CollectionLayoutData;
@@ -35,6 +33,8 @@ import org.apache.isis.applib.layout.component.FieldSetOwner;
 import org.apache.isis.applib.layout.component.PropertyLayoutData;
 import org.apache.isis.applib.layout.grid.bootstrap3.BS3Grid;
 import org.apache.isis.applib.services.layout.LayoutService;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 
 /**
  * All top-level page layout classes should implement this interface.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Col.java b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Col.java
index 5531dc7..407d5a8 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Col.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Col.java
@@ -26,7 +26,6 @@ import javax.xml.bind.annotation.XmlElementRef;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;
 
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.component.ActionLayoutData;
 import org.apache.isis.applib.layout.component.ActionLayoutDataOwner;
 import org.apache.isis.applib.layout.component.CollectionLayoutData;
@@ -35,6 +34,7 @@ import org.apache.isis.applib.layout.component.DomainObjectLayoutData;
 import org.apache.isis.applib.layout.component.DomainObjectLayoutDataOwner;
 import org.apache.isis.applib.layout.component.FieldSet;
 import org.apache.isis.applib.layout.component.FieldSetOwner;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * A column within a row which, depending on its {@link #getSpan()}, could be as narrow as 1/12th of the page's width, all the way up to spanning the entire page.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Grid.java b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Grid.java
index 3bd439c..ac81d2e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Grid.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Grid.java
@@ -28,8 +28,6 @@ import javax.xml.bind.annotation.XmlTransient;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.layout.component.ActionLayoutData;
 import org.apache.isis.applib.layout.component.CollectionLayoutData;
 import org.apache.isis.applib.layout.component.DomainObjectLayoutData;
@@ -38,6 +36,8 @@ import org.apache.isis.applib.layout.component.PropertyLayoutData;
 import org.apache.isis.applib.layout.grid.Grid;
 import org.apache.isis.applib.layout.grid.GridAbstract;
 import org.apache.isis.applib.mixins.dto.Dto;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 
 /**
  * This is the top-level for rendering the domain object's properties, collections and actions.  It simply consists
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Row.java b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Row.java
index ca61432..b00b5e9 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Row.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Row.java
@@ -28,7 +28,7 @@ import javax.xml.bind.annotation.XmlTransient;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Contains a row of content, either on the top-level {@link BS3Grid page} or at any other lower-level element that can
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Tab.java b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Tab.java
index 827726b..2a9256f 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Tab.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3Tab.java
@@ -28,11 +28,11 @@ import javax.xml.bind.annotation.XmlTransient;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.component.ActionLayoutData;
 import org.apache.isis.applib.layout.component.CollectionLayoutData;
 import org.apache.isis.applib.layout.component.DomainObjectLayoutData;
 import org.apache.isis.applib.layout.component.PropertyLayoutData;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Represents a tab within a {@link BS3TabGroup tab group}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3TabGroup.java b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3TabGroup.java
index e85332b..01817cf 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3TabGroup.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/grid/bootstrap3/BS3TabGroup.java
@@ -26,7 +26,7 @@ import javax.xml.bind.annotation.XmlTransient;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Represents a tab group containing one or more {@link BS3Tab tab}s.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/MenuBarsAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/MenuBarsAbstract.java
index 2e4026b..f426bd4 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/MenuBarsAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/MenuBarsAbstract.java
@@ -24,8 +24,8 @@ import java.util.LinkedHashMap;
 import javax.xml.bind.annotation.XmlTransient;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.layout.component.ServiceActionLayoutData;
+import org.apache.isis.commons.internal.collections._Maps;
 
 @XmlTransient // ignore this class
 public abstract class MenuBarsAbstract implements MenuBars, Serializable {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3Menu.java b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3Menu.java
index 32ce084..efbe2c3 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3Menu.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3Menu.java
@@ -26,8 +26,8 @@ import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.DomainServiceLayout;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.menubars.Menu;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Describes the collection of domain services into menubars, broadly corresponding to the aggregation of information of {@link DomainServiceLayout} that have the same value of {@link DomainServiceLayout#named()}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBar.java b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBar.java
index 229946b..a97ecc0 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBar.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBar.java
@@ -25,8 +25,8 @@ import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.DomainServiceLayout;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.menubars.MenuBar;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Describes the collection of domain services into menubars, broadly corresponding to the aggregation of information of {@link org.apache.isis.applib.annotation.DomainServiceLayout} that have the same value of {@link DomainServiceLayout#named()}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBars.java b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBars.java
index e4d5064..8361b06 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBars.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuBars.java
@@ -25,9 +25,9 @@ import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.DomainServiceLayout;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.layout.component.ServiceActionLayoutData;
 import org.apache.isis.applib.layout.menubars.MenuBars;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 /**
  * Describes the collection of domain services into menubars, broadly corresponding to the aggregation of information within {@link org.apache.isis.applib.annotation.DomainServiceLayout}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuSection.java b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuSection.java
index 5fe83e5..fbddc6c 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuSection.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/layout/menubars/bootstrap3/BS3MenuSection.java
@@ -24,10 +24,10 @@ import java.util.List;
 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlType;
 
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.component.ServiceActionLayoutData;
 import org.apache.isis.applib.layout.component.ServiceActionLayoutDataOwner;
 import org.apache.isis.applib.layout.menubars.MenuSection;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Corresponds to a domain service that contributes its serviceActions under a particular {@link BS3MenuBar}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/mixins/dto/DtoMappingHelper.java b/core/applib/src/main/java/org/apache/isis/applib/mixins/dto/DtoMappingHelper.java
index 9cb75d2..c3acd22 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/mixins/dto/DtoMappingHelper.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/mixins/dto/DtoMappingHelper.java
@@ -21,9 +21,9 @@ import javax.inject.Inject;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.schema.common.v1.BookmarkObjectState;
 import org.apache.isis.schema.common.v1.OidDto;
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_downloadLayoutXml.java b/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_downloadLayoutXml.java
index 73417c5..6e7f8a1 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_downloadLayoutXml.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_downloadLayoutXml.java
@@ -24,9 +24,9 @@ import org.apache.isis.applib.annotation.Mixin;
 import org.apache.isis.applib.annotation.ParameterLayout;
 import org.apache.isis.applib.annotation.RestrictTo;
 import org.apache.isis.applib.annotation.SemanticsOf;
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.services.layout.LayoutService;
 import org.apache.isis.applib.value.Clob;
+import org.apache.isis.commons.internal.base._Strings;
 
 @Mixin(method="act")
 public class Object_downloadLayoutXml {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_openRestApi.java b/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_openRestApi.java
index 0d6990b..93782b6 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_openRestApi.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/mixins/layout/Object_openRestApi.java
@@ -23,11 +23,11 @@ import org.apache.isis.applib.annotation.MemberOrder;
 import org.apache.isis.applib.annotation.Mixin;
 import org.apache.isis.applib.annotation.RestrictTo;
 import org.apache.isis.applib.annotation.SemanticsOf;
-import org.apache.isis.applib.internal.resources._Resource;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.services.swagger.SwaggerService;
 import org.apache.isis.applib.value.LocalResourcePath;
+import org.apache.isis.commons.internal.resources._Resource;
 
 @Mixin(method="act")
 public class Object_openRestApi {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/query/QueryAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/query/QueryAbstract.java
index d16f908..b0f0331 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/query/QueryAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/query/QueryAbstract.java
@@ -19,7 +19,7 @@
 
 package org.apache.isis.applib.query;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 
 /**
  * Convenience adapter class for {@link Query}.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/appfeat/ApplicationMemberType.java b/core/applib/src/main/java/org/apache/isis/applib/services/appfeat/ApplicationMemberType.java
index b83ba78..c831be8 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/appfeat/ApplicationMemberType.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/appfeat/ApplicationMemberType.java
@@ -18,7 +18,7 @@
  */
 package org.apache.isis.applib.services.appfeat;
 
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 
 public enum ApplicationMemberType {
     PROPERTY,
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/Bookmark.java b/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/Bookmark.java
index b8ed3d3..b742e4a 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/Bookmark.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/Bookmark.java
@@ -22,8 +22,8 @@ import java.io.Serializable;
 import java.util.Iterator;
 
 import org.apache.isis.applib.annotation.Value;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.schema.common.v1.BookmarkObjectState;
 import org.apache.isis.schema.common.v1.OidDto;
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/BookmarkService.java b/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/BookmarkService.java
index 7e9a418..f45bc17f 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/BookmarkService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/bookmark/BookmarkService.java
@@ -19,7 +19,7 @@
 package org.apache.isis.applib.services.bookmark;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.memento._Mementos.SerializingAdapter;
+import org.apache.isis.commons.internal.memento._Mementos.SerializingAdapter;
 
 /**
  * This service enables a serializable &quot;bookmark&quot; to be created for an entity.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/classdiscovery/ClassDiscoveryServiceDefault.java b/core/applib/src/main/java/org/apache/isis/applib/services/classdiscovery/ClassDiscoveryServiceDefault.java
index acd27f3..7be60fd 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/classdiscovery/ClassDiscoveryServiceDefault.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/classdiscovery/ClassDiscoveryServiceDefault.java
@@ -27,8 +27,8 @@ import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.discover._Discover;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.discover._Discover;
 
 /**
  * This utility service supports the dynamic discovery of classes from the classpath.  One service that uses this
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/command/CommandDefault.java b/core/applib/src/main/java/org/apache/isis/applib/services/command/CommandDefault.java
index de62c9b..f89a3bc 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/command/CommandDefault.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/command/CommandDefault.java
@@ -28,11 +28,11 @@ import org.apache.isis.applib.annotation.CommandExecuteIn;
 import org.apache.isis.applib.annotation.CommandPersistence;
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.applib.events.domain.ActionDomainEvent;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.util.ObjectContracts;
 import org.apache.isis.applib.util.ToString;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 
 public class CommandDefault implements Command {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java b/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java
index f123ca7..4b20c8a 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java
@@ -29,9 +29,9 @@ import org.apache.isis.applib.annotation.DomainObject;
 import org.apache.isis.applib.annotation.DomainObjectLayout;
 import org.apache.isis.applib.annotation.Editing;
 import org.apache.isis.applib.annotation.Title;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Lists;
 
 @XmlRootElement(name = "configurationProperty")
 @XmlType(
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/conmap/ContentMappingService.java b/core/applib/src/main/java/org/apache/isis/applib/services/conmap/ContentMappingService.java
index 19c960c..6f4aad0 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/conmap/ContentMappingService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/conmap/ContentMappingService.java
@@ -25,7 +25,7 @@ import java.util.stream.Collectors;
 import javax.ws.rs.core.MediaType;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 
 public interface ContentMappingService {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusImplementation.java b/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusImplementation.java
index f2834cf..625355e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusImplementation.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusImplementation.java
@@ -18,7 +18,7 @@ package org.apache.isis.applib.services.eventbus;
 
 import java.util.function.Consumer;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 
 /**
  * Common interface for all Event Bus implementations.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusService.java b/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusService.java
index e12ee72..b1ebe6d 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/eventbus/EventBusService.java
@@ -26,8 +26,8 @@ import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Sets;
 import org.apache.isis.applib.services.eventbus.EventBusImplementation.EventListener;
+import org.apache.isis.commons.internal.collections._Sets;
 
 /**
  * A service implementing an Event Bus, allowing arbitrary events to be posted and
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerAbstract.java
index ca73163..0f4e9e9 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerAbstract.java
@@ -30,9 +30,9 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.i18n.TranslatableString;
 import org.apache.isis.applib.services.i18n.TranslationService;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 /**
  * Abstract implementation of {@link ExceptionRecognizer} that looks 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerComposite.java b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerComposite.java
index af8469c..f7abf9a 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerComposite.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerComposite.java
@@ -26,9 +26,9 @@ import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.services.i18n.TranslationService;
 import org.apache.isis.applib.services.registry.ServiceRegistry;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Convenience implementation of {@link ExceptionRecognizer} that loops through a list of
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerForType.java b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerForType.java
index 2435fb7..58b7aa3 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerForType.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizerForType.java
@@ -24,7 +24,7 @@ import java.util.function.Predicate;
 
 import javax.jdo.JDODataStoreException;
 
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 /**
  * An specific implementation of {@link ExceptionRecognizer} that looks for an
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStore.java b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStore.java
index 46612ce..3ef98ec 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStore.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStore.java
@@ -25,9 +25,9 @@ import javax.annotation.PostConstruct;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.services.exceprecog.ExceptionRecognizer;
 import org.apache.isis.applib.services.exceprecog.ExceptionRecognizerComposite;
+import org.apache.isis.commons.internal.base._Strings;
 
 /**
  * Convenience implementation of the {@link ExceptionRecognizer} domain service that
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java b/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java
index 296227b..79954cf 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java
@@ -30,8 +30,8 @@ import org.apache.isis.applib.annotation.DomainServiceLayout;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.RestrictTo;
 import org.apache.isis.applib.annotation.SemanticsOf;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.context._Context;
 import org.hsqldb.util.DatabaseManagerSwing;
 
 @DomainService(
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslatableString.java b/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslatableString.java
index 9e2b7d0..f3516e9 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslatableString.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslatableString.java
@@ -26,7 +26,7 @@ import java.util.regex.Pattern;
 
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.applib.annotation.Value;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 @Value
 public final class TranslatableString {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/iactn/Interaction.java b/core/applib/src/main/java/org/apache/isis/applib/services/iactn/Interaction.java
index e9ce3b5..6eb2433 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/iactn/Interaction.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/iactn/Interaction.java
@@ -32,8 +32,6 @@ import org.apache.isis.applib.annotation.Value;
 import org.apache.isis.applib.events.domain.AbstractDomainEvent;
 import org.apache.isis.applib.events.domain.ActionDomainEvent;
 import org.apache.isis.applib.events.domain.PropertyDomainEvent;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.services.HasTransactionId;
 import org.apache.isis.applib.services.clock.ClockService;
 import org.apache.isis.applib.services.command.Command;
@@ -41,6 +39,8 @@ import org.apache.isis.applib.services.eventbus.EventBusService;
 import org.apache.isis.applib.services.metrics.MetricsService;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
 import org.apache.isis.applib.services.xactn.Transaction;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.schema.common.v1.DifferenceDto;
 import org.apache.isis.schema.common.v1.InteractionType;
 import org.apache.isis.schema.common.v1.PeriodDto;
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java b/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java
index 3616b7e..43c9826 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java
@@ -32,8 +32,8 @@ import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.w3c.dom.Attr;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/JaxbService.java b/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/JaxbService.java
index 8a1e27c..a0ef72e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/JaxbService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/JaxbService.java
@@ -32,11 +32,11 @@ import javax.xml.bind.Unmarshaller;
 import org.apache.isis.applib.ApplicationException;
 import org.apache.isis.applib.NonRecoverableException;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.mixins.dto.Dto_downloadXsd;
 import org.apache.isis.applib.util.JaxbUtil;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Maps;
 
 public interface JaxbService {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/layout/LayoutServiceMenu.java b/core/applib/src/main/java/org/apache/isis/applib/services/layout/LayoutServiceMenu.java
index 4a3b930..3b546b7 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/layout/LayoutServiceMenu.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/layout/LayoutServiceMenu.java
@@ -29,10 +29,10 @@ import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.ParameterLayout;
 import org.apache.isis.applib.annotation.RestrictTo;
 import org.apache.isis.applib.annotation.SemanticsOf;
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.services.menu.MenuBarsService;
 import org.apache.isis.applib.value.Blob;
 import org.apache.isis.applib.value.Clob;
+import org.apache.isis.commons.internal.base._Strings;
 
 @DomainService(
         nature = NatureOfService.VIEW_MENU_ONLY,
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/metamodel/MetaModelServicesMenu.java b/core/applib/src/main/java/org/apache/isis/applib/services/metamodel/MetaModelServicesMenu.java
index 0809b81..445a0be 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/metamodel/MetaModelServicesMenu.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/metamodel/MetaModelServicesMenu.java
@@ -35,8 +35,8 @@ import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.ParameterLayout;
 import org.apache.isis.applib.annotation.RestrictTo;
 import org.apache.isis.applib.annotation.SemanticsOf;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.value.Clob;
+import org.apache.isis.commons.internal.collections._Lists;
 
 @DomainService(
         nature = NatureOfService.VIEW_MENU_ONLY,
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/queryresultscache/QueryResultsCacheInternal.java b/core/applib/src/main/java/org/apache/isis/applib/services/queryresultscache/QueryResultsCacheInternal.java
index 12e994e..86fb31e 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/queryresultscache/QueryResultsCacheInternal.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/queryresultscache/QueryResultsCacheInternal.java
@@ -8,9 +8,9 @@ import javax.inject.Inject;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.services.WithTransactionScope;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/scratchpad/Scratchpad.java b/core/applib/src/main/java/org/apache/isis/applib/services/scratchpad/Scratchpad.java
index 9f45dbe..b3c219c 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/scratchpad/Scratchpad.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/scratchpad/Scratchpad.java
@@ -25,7 +25,7 @@ import javax.enterprise.context.RequestScoped;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Maps;
 
 /**
  * This service (API and implementation) provides a mechanism to interchange information between multiple objects invoked in the same
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/swagger/SwaggerServiceMenu.java b/core/applib/src/main/java/org/apache/isis/applib/services/swagger/SwaggerServiceMenu.java
index f81eb63..175b1cd 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/swagger/SwaggerServiceMenu.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/swagger/SwaggerServiceMenu.java
@@ -26,9 +26,9 @@ import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.ParameterLayout;
 import org.apache.isis.applib.annotation.RestrictTo;
 import org.apache.isis.applib.annotation.SemanticsOf;
-import org.apache.isis.applib.internal.resources._Resource;
 import org.apache.isis.applib.value.Clob;
 import org.apache.isis.applib.value.LocalResourcePath;
+import org.apache.isis.commons.internal.resources._Resource;
 
 
 @DomainService(
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingService.java b/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingService.java
index 4e3d978..b526d0b 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingService.java
@@ -19,8 +19,8 @@ package org.apache.isis.applib.services.urlencoding;
 import java.nio.charset.StandardCharsets;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.memento._Mementos.EncoderDecoder;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.memento._Mementos.EncoderDecoder;
 
 public interface UrlEncodingService extends EncoderDecoder {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceUsingBaseEncodingAbstract.java b/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceUsingBaseEncodingAbstract.java
index 0fd3b4a..d5dd992 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceUsingBaseEncodingAbstract.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceUsingBaseEncodingAbstract.java
@@ -18,8 +18,8 @@ package org.apache.isis.applib.services.urlencoding;
 
 import java.nio.charset.StandardCharsets;
 
-import org.apache.isis.applib.internal.base._Bytes;
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Bytes;
+import org.apache.isis.commons.internal.base._Strings;
 
 /**
  * to use, subclass and annotated with:
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceWithCompression.java b/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceWithCompression.java
index 8b40336..be4f4dd 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceWithCompression.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/urlencoding/UrlEncodingServiceWithCompression.java
@@ -4,8 +4,8 @@ import java.nio.charset.StandardCharsets;
 
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
-import org.apache.isis.applib.internal.base._Bytes;
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Bytes;
+import org.apache.isis.commons.internal.base._Strings;
 
 @DomainService(
         nature = NatureOfService.DOMAIN,
diff --git a/core/applib/src/main/java/org/apache/isis/applib/spec/AbstractSpecification2.java b/core/applib/src/main/java/org/apache/isis/applib/spec/AbstractSpecification2.java
index 818587a..c43541a 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/spec/AbstractSpecification2.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/spec/AbstractSpecification2.java
@@ -21,8 +21,8 @@ package org.apache.isis.applib.spec;
 
 import java.lang.reflect.Method;
 
-import org.apache.isis.applib.internal.base._Casts;
 import org.apache.isis.applib.services.i18n.TranslatableString;
+import org.apache.isis.commons.internal.base._Casts;
 
 /**
  * Adapter to make it easy to write {@link Specification}s.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/tree/LazyTreeNode.java b/core/applib/src/main/java/org/apache/isis/applib/tree/LazyTreeNode.java
index ffe6554..a5a9200 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/tree/LazyTreeNode.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/tree/LazyTreeNode.java
@@ -23,8 +23,8 @@ import java.util.concurrent.atomic.LongAdder;
 import java.util.stream.Stream;
 
 import org.apache.isis.applib.annotation.Value;
-import org.apache.isis.applib.internal.base._Lazy;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.base._Lazy;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 @Value(semanticsProviderName="org.apache.isis.core.metamodel.facets.value.treenode.TreeNodeValueSemanticsProvider")
 public class LazyTreeNode<T> implements TreeNode<T> {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/tree/TreeNode.java b/core/applib/src/main/java/org/apache/isis/applib/tree/TreeNode.java
index 06413c3..a9719ec 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/tree/TreeNode.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/tree/TreeNode.java
@@ -28,7 +28,7 @@ import java.util.stream.StreamSupport;
 import javax.annotation.Nullable;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 
 public interface TreeNode<T> {
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/Enums.java b/core/applib/src/main/java/org/apache/isis/applib/util/Enums.java
index 72625f8..65d5a55 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/Enums.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/Enums.java
@@ -21,7 +21,7 @@ package org.apache.isis.applib.util;
 
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 
 public final class Enums {
     
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/Equality.java b/core/applib/src/main/java/org/apache/isis/applib/util/Equality.java
index 5d0ae44..fcf9f6f 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/Equality.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/Equality.java
@@ -4,8 +4,8 @@ import java.util.List;
 import java.util.Objects;
 import java.util.function.Function;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Fluent Object Equality Composition.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/Hashing.java b/core/applib/src/main/java/org/apache/isis/applib/util/Hashing.java
index 2d327d1..8e03dbe 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/Hashing.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/Hashing.java
@@ -4,7 +4,7 @@ import java.util.List;
 import java.util.Objects;
 import java.util.function.Function;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Fluent Object Hash Code Composition.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/JaxbUtil.java b/core/applib/src/main/java/org/apache/isis/applib/util/JaxbUtil.java
index f699028..7ceb865 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/JaxbUtil.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/JaxbUtil.java
@@ -29,9 +29,9 @@ import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import javax.xml.bind.Unmarshaller;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.resources._Resource;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.resources._Resource;
 
 
 /**
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContract_Parser.java b/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContract_Parser.java
index cc33d95..8052c30 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContract_Parser.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContract_Parser.java
@@ -31,9 +31,9 @@ import java.util.stream.Collectors;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.util.ObjectContracts.ObjectContract;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Strings;
 
 /**
  * Package private parser for ObjectContract.<br/><br/>
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java b/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java
index 868c402..1f62169 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java
@@ -22,8 +22,8 @@ import java.util.Comparator;
 import java.util.Objects;
 import java.util.function.Function;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/TitleBuffer.java b/core/applib/src/main/java/org/apache/isis/applib/util/TitleBuffer.java
index 6d804a7..3c2f1e0 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/TitleBuffer.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/TitleBuffer.java
@@ -22,7 +22,7 @@ package org.apache.isis.applib.util;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 
 /**
  * Title buffer is a utility class to help produce titles for objects without
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/ToString.java b/core/applib/src/main/java/org/apache/isis/applib/util/ToString.java
index 0932254..4bfc09b 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/ToString.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/ToString.java
@@ -6,7 +6,7 @@ import java.util.Objects;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * Fluent Object to String Composition.
diff --git a/core/applib/src/main/java/org/apache/isis/schema/utils/ChangesDtoUtils.java b/core/applib/src/main/java/org/apache/isis/schema/utils/ChangesDtoUtils.java
index 88c9275..103571d 100644
--- a/core/applib/src/main/java/org/apache/isis/schema/utils/ChangesDtoUtils.java
+++ b/core/applib/src/main/java/org/apache/isis/schema/utils/ChangesDtoUtils.java
@@ -31,9 +31,8 @@ import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import javax.xml.bind.Unmarshaller;
 
-import org.apache.isis.applib.internal.resources._Resource;
-
 import org.apache.isis.applib.util.JaxbUtil;
+import org.apache.isis.commons.internal.resources._Resource;
 import org.apache.isis.schema.chg.v1.ChangesDto;
 
 public final class ChangesDtoUtils {
diff --git a/core/applib/src/main/java/org/apache/isis/schema/utils/CommandDtoUtils.java b/core/applib/src/main/java/org/apache/isis/schema/utils/CommandDtoUtils.java
index 8139d68..eea9dd4 100644
--- a/core/applib/src/main/java/org/apache/isis/schema/utils/CommandDtoUtils.java
+++ b/core/applib/src/main/java/org/apache/isis/schema/utils/CommandDtoUtils.java
@@ -30,8 +30,8 @@ import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import javax.xml.bind.Unmarshaller;
 
-import org.apache.isis.applib.internal.resources._Resource;
 import org.apache.isis.applib.util.JaxbUtil;
+import org.apache.isis.commons.internal.resources._Resource;
 import org.apache.isis.schema.cmd.v1.ActionDto;
 import org.apache.isis.schema.cmd.v1.CommandDto;
 import org.apache.isis.schema.cmd.v1.MapDto;
diff --git a/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java b/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java
index 252a1f7..e5c74fa 100644
--- a/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java
+++ b/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java
@@ -18,7 +18,7 @@
  */
 package org.apache.isis.schema.utils;
 
-import static org.apache.isis.applib.internal.collections._Maps.entry;
+import static org.apache.isis.commons.internal.collections._Maps.entry;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
@@ -28,15 +28,15 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.function.Function;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.context._Context;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.value.Blob;
 import org.apache.isis.applib.value.Clob;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.schema.cmd.v1.MapDto;
 import org.apache.isis.schema.cmd.v1.ParamDto;
 import org.apache.isis.schema.common.v1.BlobDto;
diff --git a/core/applib/src/main/java/org/apache/isis/schema/utils/InteractionDtoUtils.java b/core/applib/src/main/java/org/apache/isis/schema/utils/InteractionDtoUtils.java
index 0c50997..199f899 100644
--- a/core/applib/src/main/java/org/apache/isis/schema/utils/InteractionDtoUtils.java
+++ b/core/applib/src/main/java/org/apache/isis/schema/utils/InteractionDtoUtils.java
@@ -34,13 +34,13 @@ import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import javax.xml.bind.Unmarshaller;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.resources._Resource;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.services.iactn.Interaction;
 import org.apache.isis.applib.util.JaxbUtil;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.resources._Resource;
 import org.apache.isis.schema.cmd.v1.ParamDto;
 import org.apache.isis.schema.cmd.v1.ParamsDto;
 import org.apache.isis.schema.common.v1.InteractionType;
diff --git a/core/applib/src/main/java/org/apache/isis/schema/utils/MemberExecutionDtoUtils.java b/core/applib/src/main/java/org/apache/isis/schema/utils/MemberExecutionDtoUtils.java
index f31ff9c..b0966a8 100644
--- a/core/applib/src/main/java/org/apache/isis/schema/utils/MemberExecutionDtoUtils.java
+++ b/core/applib/src/main/java/org/apache/isis/schema/utils/MemberExecutionDtoUtils.java
@@ -29,8 +29,8 @@ import javax.xml.bind.Unmarshaller;
 import javax.xml.namespace.QName;
 import javax.xml.transform.stream.StreamSource;
 
-import org.apache.isis.applib.internal.base._Casts;
 import org.apache.isis.applib.util.JaxbUtil;
+import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.schema.common.v1.DifferenceDto;
 import org.apache.isis.schema.common.v1.PeriodDto;
 import org.apache.isis.schema.ixn.v1.MemberExecutionDto;
diff --git a/core/applib/src/main/java/org/apache/isis/schema/utils/jaxbadapters/PersistentEntitiesAdapter.java b/core/applib/src/main/java/org/apache/isis/schema/utils/jaxbadapters/PersistentEntitiesAdapter.java
index 3e2e2a1..ab962d4 100644
--- a/core/applib/src/main/java/org/apache/isis/schema/utils/jaxbadapters/PersistentEntitiesAdapter.java
+++ b/core/applib/src/main/java/org/apache/isis/schema/utils/jaxbadapters/PersistentEntitiesAdapter.java
@@ -21,9 +21,9 @@ import java.util.List;
 import javax.inject.Inject;
 import javax.xml.bind.annotation.adapters.XmlAdapter;
 
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.schema.common.v1.OidDto;
 import org.apache.isis.schema.common.v1.OidsDto;
 
diff --git a/core/applib/src/test/java/org/apache/isis/applib/Module_Util_transitiveDependenciesOf_Test.java b/core/applib/src/test/java/org/apache/isis/applib/Module_Util_transitiveDependenciesOf_Test.java
index ce4301e..2c29856 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/Module_Util_transitiveDependenciesOf_Test.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/Module_Util_transitiveDependenciesOf_Test.java
@@ -25,8 +25,8 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Sets;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Sets;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
diff --git a/core/applib/src/test/java/org/apache/isis/applib/internal/base/BytesTest.java b/core/applib/src/test/java/org/apache/isis/applib/internal/base/BytesTest.java
index 2933a2f..66585bd 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/internal/base/BytesTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/internal/base/BytesTest.java
@@ -24,7 +24,9 @@ import static org.hamcrest.Matchers.lessThan;
 import java.nio.charset.StandardCharsets;
 import java.util.Base64;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Bytes;
+import org.apache.isis.commons.internal.base._Strings;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/core/applib/src/test/java/org/apache/isis/applib/internal/base/NullSafeTest.java b/core/applib/src/test/java/org/apache/isis/applib/internal/base/NullSafeTest.java
index 2ff8422..58c1834 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/internal/base/NullSafeTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/internal/base/NullSafeTest.java
@@ -28,6 +28,8 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.stream.Collectors;
 
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._Strings;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/core/applib/src/test/java/org/apache/isis/applib/internal/base/ReductionTest.java b/core/applib/src/test/java/org/apache/isis/applib/internal/base/ReductionTest.java
index aa6d861..7b5a4ea 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/internal/base/ReductionTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/internal/base/ReductionTest.java
@@ -23,7 +23,8 @@ import static org.hamcrest.CoreMatchers.is;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._Reduction;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/core/applib/src/test/java/org/apache/isis/applib/internal/base/StringsTest.java b/core/applib/src/test/java/org/apache/isis/applib/internal/base/StringsTest.java
index f9cf466..3ebc1ed 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/internal/base/StringsTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/internal/base/StringsTest.java
@@ -25,7 +25,9 @@ import static org.hamcrest.CoreMatchers.nullValue;
 import java.nio.charset.StandardCharsets;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Bytes;
+import org.apache.isis.commons.internal.base._Strings;
 import org.junit.Assert;
 import org.junit.Test;
 
diff --git a/core/applib/src/test/java/org/apache/isis/applib/internal/compare/ComparatorsTest.java b/core/applib/src/test/java/org/apache/isis/applib/internal/compare/ComparatorsTest.java
index 4d21a50..dc83cf2 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/internal/compare/ComparatorsTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/internal/compare/ComparatorsTest.java
@@ -27,7 +27,8 @@ import java.util.List;
 import java.util.SortedSet;
 import java.util.TreeSet;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.compare._Comparators;
 import org.junit.Assert;
 import org.junit.Rule;
 import org.junit.Test;
diff --git a/core/applib/src/test/java/org/apache/isis/applib/internal/memento/MementosTest.java b/core/applib/src/test/java/org/apache/isis/applib/internal/memento/MementosTest.java
index df384f1..2fb86aa 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/internal/memento/MementosTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/internal/memento/MementosTest.java
@@ -28,13 +28,14 @@ import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.util.Date;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.memento._Mementos.Memento;
-import org.apache.isis.applib.internal.memento._Mementos.SerializingAdapter;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.urlencoding.UrlEncodingService;
 import org.apache.isis.applib.services.urlencoding.UrlEncodingServiceUsingBaseEncodingAbstract;
 import org.apache.isis.applib.services.urlencoding.UrlEncodingServiceWithCompression;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.memento._Mementos;
+import org.apache.isis.commons.internal.memento._Mementos.Memento;
+import org.apache.isis.commons.internal.memento._Mementos.SerializingAdapter;
 import org.joda.time.LocalDate;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/core/applib/src/test/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStoreTest.java b/core/applib/src/test/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStoreTest.java
index 80c6947..5e991b7 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStoreTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerCompositeForJdoObjectStoreTest.java
@@ -23,7 +23,7 @@ import static org.junit.Assert.assertThat;
 
 import java.util.Collections;
 
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.junit.Before;
 import org.junit.Test;
 
diff --git a/core/applib/src/test/java/org/apache/isis/applib/services/xmlsnapshot/XmlSnapshotServiceAbstractTest.java b/core/applib/src/test/java/org/apache/isis/applib/services/xmlsnapshot/XmlSnapshotServiceAbstractTest.java
index 25398ef..d8addfd 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/services/xmlsnapshot/XmlSnapshotServiceAbstractTest.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/services/xmlsnapshot/XmlSnapshotServiceAbstractTest.java
@@ -24,7 +24,7 @@ import java.math.BigInteger;
 import java.nio.charset.Charset;
 import java.util.Locale;
 
-import org.apache.isis.applib.internal.resources._Resource;
+import org.apache.isis.commons.internal.resources._Resource;
 import org.joda.time.LocalDate;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/core/applib/src/test/java/org/apache/isis/applib/util/ObjectContractsTest_equals_and_hashCode.java b/core/applib/src/test/java/org/apache/isis/applib/util/ObjectContractsTest_equals_and_hashCode.java
index 15dae41..50c9123 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/util/ObjectContractsTest_equals_and_hashCode.java
+++ b/core/applib/src/test/java/org/apache/isis/applib/util/ObjectContractsTest_equals_and_hashCode.java
@@ -18,7 +18,7 @@ package org.apache.isis.applib.util;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.unittestsupport.value.ValueTypeContractTestAbstract;
 import org.junit.Before;
 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/exceptions/package-info.java b/core/commons/src/main/java/org/apache/isis/applib/internal/exceptions/package-info.java
deleted file mode 100644
index 6e178b7..0000000
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/exceptions/package-info.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- *  Licensed to the Apache Software Foundation (ASF) under one
- *  or more contributor license agreements.  See the NOTICE file
- *  distributed with this work for additional information
- *  regarding copyright ownership.  The ASF licenses this file
- *  to you under the Apache License, Version 2.0 (the
- *  "License"); you may not use this file except in compliance
- *  with the License.  You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing,
- *  software distributed under the License is distributed on an
- *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- *  KIND, either express or implied.  See the License for the
- *  specific language governing permissions and limitations
- *  under the License.
- */
-/**
- * <h1>Internal API</h1>
- * Internal classes, contributing to the internal proprietary API. 
- * These may be changed or removed without notice!
- * <p>
- * <b>WARNING</b>: 
- * Do NOT use any of the classes provided by this package!
- * </p>
- */
-package org.apache.isis.applib.internal.exceptions;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/functions/package-info.java b/core/commons/src/main/java/org/apache/isis/applib/internal/functions/package-info.java
deleted file mode 100644
index a517ed7..0000000
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/functions/package-info.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- *  Licensed to the Apache Software Foundation (ASF) under one
- *  or more contributor license agreements.  See the NOTICE file
- *  distributed with this work for additional information
- *  regarding copyright ownership.  The ASF licenses this file
- *  to you under the Apache License, Version 2.0 (the
- *  "License"); you may not use this file except in compliance
- *  with the License.  You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing,
- *  software distributed under the License is distributed on an
- *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- *  KIND, either express or implied.  See the License for the
- *  specific language governing permissions and limitations
- *  under the License.
- */
-/**
- * <h1>Internal API</h1>
- * Internal classes, contributing to the internal proprietary API. 
- * These may be changed or removed without notice!
- * <p>
- * <b>WARNING</b>: 
- * Do NOT use any of the classes provided by this package!
- * </p>
- */
-package org.apache.isis.applib.internal.functions;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/memento/package-info.java b/core/commons/src/main/java/org/apache/isis/applib/internal/memento/package-info.java
deleted file mode 100644
index 098b24b..0000000
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/memento/package-info.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- *  Licensed to the Apache Software Foundation (ASF) under one
- *  or more contributor license agreements.  See the NOTICE file
- *  distributed with this work for additional information
- *  regarding copyright ownership.  The ASF licenses this file
- *  to you under the Apache License, Version 2.0 (the
- *  "License"); you may not use this file except in compliance
- *  with the License.  You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing,
- *  software distributed under the License is distributed on an
- *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- *  KIND, either express or implied.  See the License for the
- *  specific language governing permissions and limitations
- *  under the License.
- */
-/**
- * <h1>Internal API</h1>
- * Internal classes, contributing to the internal proprietary API. 
- * These may be changed or removed without notice!
- * <p>
- * <b>WARNING</b>: 
- * Do NOT use any of the classes provided by this package!
- * </p>
- */
-package org.apache.isis.applib.internal.memento;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/package-info.java b/core/commons/src/main/java/org/apache/isis/applib/internal/resources/package-info.java
deleted file mode 100644
index a6e3073..0000000
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/package-info.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- *  Licensed to the Apache Software Foundation (ASF) under one
- *  or more contributor license agreements.  See the NOTICE file
- *  distributed with this work for additional information
- *  regarding copyright ownership.  The ASF licenses this file
- *  to you under the Apache License, Version 2.0 (the
- *  "License"); you may not use this file except in compliance
- *  with the License.  You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing,
- *  software distributed under the License is distributed on an
- *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- *  KIND, either express or implied.  See the License for the
- *  specific language governing permissions and limitations
- *  under the License.
- */
-/**
- * <h1>Internal API</h1>
- * Internal classes, contributing to the internal proprietary API. 
- * These may be changed or removed without notice!
- * <p>
- * <b>WARNING</b>: 
- * Do NOT use any of the classes provided by this package!
- * </p>
- */
-package org.apache.isis.applib.internal.resources;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/_Constants.java b/core/commons/src/main/java/org/apache/isis/commons/internal/_Constants.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/_Constants.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/_Constants.java
index 3f3093e..85c86a4 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/_Constants.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/_Constants.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal;
+package org.apache.isis.commons.internal;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes.java
similarity index 99%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes.java
index b7d0261..107d8db 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes_GZipCompressor.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes_GZipCompressor.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes_GZipCompressor.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes_GZipCompressor.java
index 8a17814..fa40339 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes_GZipCompressor.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes_GZipCompressor.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes_GZipCompressorSmart.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes_GZipCompressorSmart.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes_GZipCompressorSmart.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes_GZipCompressorSmart.java
index bb40430..b42b5a4 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Bytes_GZipCompressorSmart.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Bytes_GZipCompressorSmart.java
@@ -17,12 +17,12 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.io.IOException;
 import java.util.Arrays;
 
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Casts.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Casts.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Casts.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Casts.java
index d201ff6..3757b0e 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Casts.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Casts.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.util.Objects;
 import java.util.function.Supplier;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Lazy.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Lazy.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Lazy.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Lazy.java
index 802ec57..f10f7c5 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Lazy.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Lazy.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.util.Objects;
 import java.util.function.Supplier;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_NullSafe.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_NullSafe.java
similarity index 99%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_NullSafe.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_NullSafe.java
index f3c23a2..3bd6c63 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_NullSafe.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_NullSafe.java
@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.util.Collection;
 import java.util.Comparator;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Reduction.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Reduction.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Reduction.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Reduction.java
index a65aef1..0ab5a8e 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Reduction.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Reduction.java
@@ -1,4 +1,4 @@
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.util.Objects;
 import java.util.Optional;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings.java
index cfafe99..61730d5 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings.java
@@ -17,9 +17,9 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
-import static org.apache.isis.applib.internal.base._Strings_SplitIterator.splitIterator;
+import static org.apache.isis.commons.internal.base._Strings_SplitIterator.splitIterator;
 
 import java.nio.charset.Charset;
 import java.util.Objects;
@@ -31,8 +31,8 @@ import java.util.stream.StreamSupport;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.base._Bytes.BytesOperator;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Bytes.BytesOperator;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings_NaturalNames.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings_NaturalNames.java
similarity index 98%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings_NaturalNames.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings_NaturalNames.java
index 3f03a84..175a41f 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings_NaturalNames.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings_NaturalNames.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import javax.annotation.Nullable;
 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings_SplitIterator.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings_SplitIterator.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings_SplitIterator.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings_SplitIterator.java
index 3e89771..bf02dd1 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/_Strings_SplitIterator.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings_SplitIterator.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.base;
+package org.apache.isis.commons.internal.base;
 
 import java.util.Collections;
 import java.util.Iterator;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/package-info.java
similarity index 95%
copy from core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
copy to core/commons/src/main/java/org/apache/isis/commons/internal/base/package-info.java
index d2b2cf0..f34bab6 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.base;
\ No newline at end of file
+package org.apache.isis.commons.internal.base;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays.java
similarity index 96%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays.java
index e4ef798..a2486bf 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.lang.reflect.Array;
 import java.util.Collection;
@@ -26,9 +26,9 @@ import java.util.stream.Collector;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays_Collector.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays_Collector.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays_Collector.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays_Collector.java
index b0dd466..17fdc7a 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays_Collector.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays_Collector.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.lang.reflect.Array;
 import java.util.Collections;
@@ -28,7 +28,7 @@ import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Collector;
 
-import org.apache.isis.applib.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Casts;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays_CollectorUnknownSize.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays_CollectorUnknownSize.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays_CollectorUnknownSize.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays_CollectorUnknownSize.java
index f9f976f..d1d547e 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Arrays_CollectorUnknownSize.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Arrays_CollectorUnknownSize.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.lang.reflect.Array;
 import java.util.ArrayList;
@@ -30,7 +30,7 @@ import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Collector;
 
-import org.apache.isis.applib.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Casts;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections.java
similarity index 98%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections.java
index dd117f0..91dffda 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.lang.reflect.Field;
 import java.lang.reflect.ParameterizedType;
@@ -40,7 +40,7 @@ import java.util.stream.Collectors;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections_Collector.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections_Collector.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections_Collector.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections_Collector.java
index 10a8b7a..3d82f42 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections_Collector.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections_Collector.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.util.Collection;
 import java.util.Collections;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections_SortedSetOfList.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections_SortedSetOfList.java
similarity index 98%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections_SortedSetOfList.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections_SortedSetOfList.java
index d78558c..6b65bc3 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Collections_SortedSetOfList.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Collections_SortedSetOfList.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.util.Collection;
 import java.util.Comparator;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Lists.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Lists.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Lists.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Lists.java
index eaa6595..adcb841 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Lists.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Lists.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -31,7 +31,7 @@ import java.util.stream.Collectors;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Maps.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Maps.java
similarity index 98%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Maps.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Maps.java
index 059b02d..dbf8497 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Maps.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Maps.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.util.AbstractMap;
 import java.util.Collections;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Multimaps.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Multimaps.java
similarity index 99%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Multimaps.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Multimaps.java
index 5ad592b..a2a7ef0 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Multimaps.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Multimaps.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.util.ArrayList;
 import java.util.Collection;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Sets.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Sets.java
similarity index 98%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Sets.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Sets.java
index 6abd9b1..e12c8a1 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/_Sets.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/_Sets.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.collections;
+package org.apache.isis.commons.internal.collections;
 
 import java.util.Collection;
 import java.util.Collections;
@@ -34,7 +34,7 @@ import java.util.stream.Stream;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/package-info.java
similarity index 95%
copy from core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
copy to core/commons/src/main/java/org/apache/isis/commons/internal/collections/package-info.java
index d2b2cf0..e6e2c22 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/collections/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.base;
\ No newline at end of file
+package org.apache.isis.commons.internal.collections;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/compare/_Comparators.java b/core/commons/src/main/java/org/apache/isis/commons/internal/compare/_Comparators.java
similarity index 96%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/compare/_Comparators.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/compare/_Comparators.java
index da189df..8c5a42b 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/compare/_Comparators.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/compare/_Comparators.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.compare;
+package org.apache.isis.commons.internal.compare;
 
 import java.util.Comparator;
 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/compare/_Comparators_SequenceCompare.java b/core/commons/src/main/java/org/apache/isis/commons/internal/compare/_Comparators_SequenceCompare.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/compare/_Comparators_SequenceCompare.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/compare/_Comparators_SequenceCompare.java
index dfbacee..a586288 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/compare/_Comparators_SequenceCompare.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/compare/_Comparators_SequenceCompare.java
@@ -16,13 +16,13 @@
  *  specific language governing permissions and limitations
  *  under the License.
  */
-package org.apache.isis.applib.internal.compare;
+package org.apache.isis.commons.internal.compare;
 
 import java.util.StringTokenizer;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/discover/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/compare/package-info.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/discover/package-info.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/compare/package-info.java
index 7dccefa..f34a9f7 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/discover/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/compare/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.discover;
\ No newline at end of file
+package org.apache.isis.commons.internal.compare;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/context/_Context.java b/core/commons/src/main/java/org/apache/isis/commons/internal/context/_Context.java
similarity index 97%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/context/_Context.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/context/_Context.java
index 953a7b5..0da16ae 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/context/_Context.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/context/_Context.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.context;
+package org.apache.isis.commons.internal.context;
 
 import java.util.HashMap;
 import java.util.List;
@@ -26,9 +26,9 @@ import java.util.Objects;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/context/_Plugin.java b/core/commons/src/main/java/org/apache/isis/commons/internal/context/_Plugin.java
similarity index 96%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/context/_Plugin.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/context/_Plugin.java
index b328945..c2ac726 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/context/_Plugin.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/context/_Plugin.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.context;
+package org.apache.isis.commons.internal.context;
 
 import java.util.Objects;
 import java.util.ServiceLoader;
@@ -26,8 +26,8 @@ import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Sets;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Sets;
 import org.apache.isis.core.plugins.PluginResolveException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/context/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/context/package-info.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/context/package-info.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/context/package-info.java
index 84caa68..b832b66 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/context/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/context/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.context;
\ No newline at end of file
+package org.apache.isis.commons.internal.context;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/discover/_Discover.java b/core/commons/src/main/java/org/apache/isis/commons/internal/discover/_Discover.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/discover/_Discover.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/discover/_Discover.java
index 7593f27..a9e98bf 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/discover/_Discover.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/discover/_Discover.java
@@ -17,11 +17,11 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.discover;
+package org.apache.isis.commons.internal.discover;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 import org.apache.isis.core.plugins.classdiscovery.ClassDiscovery;
 import org.apache.isis.core.plugins.classdiscovery.ClassDiscoveryPlugin;
 import org.slf4j.Logger;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/discover/package-info.java
similarity index 95%
copy from core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
copy to core/commons/src/main/java/org/apache/isis/commons/internal/discover/package-info.java
index d2b2cf0..a969e84 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/discover/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.base;
\ No newline at end of file
+package org.apache.isis.commons.internal.discover;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/exceptions/_Exceptions.java b/core/commons/src/main/java/org/apache/isis/commons/internal/exceptions/_Exceptions.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/exceptions/_Exceptions.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/exceptions/_Exceptions.java
index b4a7312..4d1c557 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/exceptions/_Exceptions.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/exceptions/_Exceptions.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.exceptions;
+package org.apache.isis.commons.internal.exceptions;
 
 import java.util.Collections;
 import java.util.List;
@@ -26,8 +26,8 @@ import java.util.stream.Stream;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/exceptions/package-info.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/collections/package-info.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/exceptions/package-info.java
index 455f8c3..b562021 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/collections/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/exceptions/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.collections;
\ No newline at end of file
+package org.apache.isis.commons.internal.exceptions;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/functions/_Functions.java b/core/commons/src/main/java/org/apache/isis/commons/internal/functions/_Functions.java
similarity index 96%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/functions/_Functions.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/functions/_Functions.java
index 9a33621..d5bfb51 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/functions/_Functions.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/functions/_Functions.java
@@ -16,7 +16,7 @@
  *  specific language governing permissions and limitations
  *  under the License.
  */
-package org.apache.isis.applib.internal.functions;
+package org.apache.isis.commons.internal.functions;
 
 import java.util.function.Function;
 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/functions/_Functions_IndexAwareFunctionAdapter.java b/core/commons/src/main/java/org/apache/isis/commons/internal/functions/_Functions_IndexAwareFunctionAdapter.java
similarity index 91%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/functions/_Functions_IndexAwareFunctionAdapter.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/functions/_Functions_IndexAwareFunctionAdapter.java
index 883abe0..7b9aaa6 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/functions/_Functions_IndexAwareFunctionAdapter.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/functions/_Functions_IndexAwareFunctionAdapter.java
@@ -16,11 +16,11 @@
  *  specific language governing permissions and limitations
  *  under the License.
  */
-package org.apache.isis.applib.internal.functions;
+package org.apache.isis.commons.internal.functions;
 
 import java.util.function.Function;
 
-import org.apache.isis.applib.internal.functions._Functions.IndexAwareFunction;
+import org.apache.isis.commons.internal.functions._Functions.IndexAwareFunction;
 
 /**
  * Package private mixin for _Functions. <br/>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/functions/package-info.java
similarity index 95%
copy from core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
copy to core/commons/src/main/java/org/apache/isis/commons/internal/functions/package-info.java
index d2b2cf0..17e00e3 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/functions/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.base;
\ No newline at end of file
+package org.apache.isis.commons.internal.functions;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/memento/_Mementos.java b/core/commons/src/main/java/org/apache/isis/commons/internal/memento/_Mementos.java
similarity index 98%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/memento/_Mementos.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/memento/_Mementos.java
index 17d991e..70c9df3 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/memento/_Mementos.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/memento/_Mementos.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.memento;
+package org.apache.isis.commons.internal.memento;
 
 import java.io.ObjectInput;
 import java.io.ObjectOutput;
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/memento/_Mementos_MementoDefault.java b/core/commons/src/main/java/org/apache/isis/commons/internal/memento/_Mementos_MementoDefault.java
similarity index 87%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/memento/_Mementos_MementoDefault.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/memento/_Mementos_MementoDefault.java
index 0e1fe85..bdda879 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/memento/_Mementos_MementoDefault.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/memento/_Mementos_MementoDefault.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.memento;
+package org.apache.isis.commons.internal.memento;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -32,14 +32,14 @@ import java.util.Set;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.collections._Sets;
-import org.apache.isis.applib.internal.context._Context;
-import org.apache.isis.applib.internal.memento._Mementos.EncoderDecoder;
-import org.apache.isis.applib.internal.memento._Mementos.Memento;
-import org.apache.isis.applib.internal.memento._Mementos.SerializingAdapter;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Sets;
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.commons.internal.memento._Mementos.EncoderDecoder;
+import org.apache.isis.commons.internal.memento._Mementos.Memento;
+import org.apache.isis.commons.internal.memento._Mementos.SerializingAdapter;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/compare/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/memento/package-info.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/compare/package-info.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/memento/package-info.java
index 5ab700c..99476f3 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/compare/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/memento/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.compare;
\ No newline at end of file
+package org.apache.isis.commons.internal.memento;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/package-info.java
similarity index 96%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/package-info.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/package-info.java
index ae7cd45..9fa8283 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal;
\ No newline at end of file
+package org.apache.isis.commons.internal;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource.java b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource.java
index 193f78d..951745d 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource.java
@@ -17,16 +17,16 @@
  *  under the License.
  */
 
-package org.apache.isis.applib.internal.resources;
+package org.apache.isis.commons.internal.resources;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.Charset;
 import java.util.Objects;
 
-import org.apache.isis.applib.internal.base._Bytes;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.base._Bytes;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.context._Context;
 
 /**
  * <h1>- internal use only -</h1>
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_ContextPath.java b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_ContextPath.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_ContextPath.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_ContextPath.java
index 7a722f5..e5aa304 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_ContextPath.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_ContextPath.java
@@ -18,7 +18,7 @@
  */
 
 
-package org.apache.isis.applib.internal.resources;
+package org.apache.isis.commons.internal.resources;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_Path.java b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_Path.java
similarity index 94%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_Path.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_Path.java
index 3b2a183..a5342d1 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_Path.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_Path.java
@@ -18,9 +18,9 @@
  */
 
 
-package org.apache.isis.applib.internal.resources;
+package org.apache.isis.commons.internal.resources;
 
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_RestfulPath.java b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_RestfulPath.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_RestfulPath.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_RestfulPath.java
index e5fb3d9..a43ae13 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/resources/_Resource_RestfulPath.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resource_RestfulPath.java
@@ -18,7 +18,7 @@
  */
 
 
-package org.apache.isis.applib.internal.resources;
+package org.apache.isis.commons.internal.resources;
 
 /**
  * 
diff --git a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/package-info.java
similarity index 95%
rename from core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
rename to core/commons/src/main/java/org/apache/isis/commons/internal/resources/package-info.java
index d2b2cf0..435400b 100644
--- a/core/commons/src/main/java/org/apache/isis/applib/internal/base/package-info.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/package-info.java
@@ -25,4 +25,4 @@
  * Do NOT use any of the classes provided by this package!
  * </p>
  */
-package org.apache.isis.applib.internal.base;
\ No newline at end of file
+package org.apache.isis.commons.internal.resources;
\ No newline at end of file
diff --git a/core/commons/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPlugin.java b/core/commons/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPlugin.java
index 8976967..bb68ed9 100644
--- a/core/commons/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPlugin.java
+++ b/core/commons/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPlugin.java
@@ -23,7 +23,7 @@ import java.util.function.Predicate;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 
 public interface ProxyFactoryPlugin {
 
diff --git a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract.java b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract.java
index cc90cb2..e43d96a 100644
--- a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract.java
+++ b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract.java
@@ -24,7 +24,6 @@ import org.apache.isis.applib.NonRecoverableException;
 import org.apache.isis.applib.RecoverableException;
 import org.apache.isis.applib.fixtures.FixtureClock;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.clock.ClockService;
 import org.apache.isis.applib.services.factory.FactoryService;
 import org.apache.isis.applib.services.registry.ServiceRegistry;
@@ -32,6 +31,7 @@ import org.apache.isis.applib.services.scratchpad.Scratchpad;
 import org.apache.isis.applib.services.sessmgmt.SessionManagementService;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
 import org.apache.isis.applib.services.xactn.TransactionService;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.core.runtime.system.transaction.IsisTransactionManager;
 import org.apache.isis.core.specsupport.scenarios.ScenarioExecution;
 import org.apache.isis.core.specsupport.specs.CukeGlueAbstract;
diff --git a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract3.java b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract3.java
index ea9c68c..c48e37c 100644
--- a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract3.java
+++ b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IntegrationTestAbstract3.java
@@ -24,9 +24,9 @@ import org.apache.isis.applib.AppManifest;
 import org.apache.isis.applib.Module;
 import org.apache.isis.applib.NonRecoverableException;
 import org.apache.isis.applib.RecoverableException;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.jdosupport.IsisJdoSupport;
 import org.apache.isis.applib.services.xactn.TransactionService;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.core.runtime.headless.HeadlessWithBootstrappingAbstract;
 import org.apache.isis.core.runtime.headless.IsisSystem;
 import org.apache.isis.core.runtime.headless.logging.LogConfig;
diff --git a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IsisSystemForTest.java b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IsisSystemForTest.java
index c2fef4d..0a9be65 100644
--- a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IsisSystemForTest.java
+++ b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/IsisSystemForTest.java
@@ -28,10 +28,10 @@ import java.util.stream.Collectors;
 import org.apache.isis.applib.AppManifest;
 import org.apache.isis.applib.fixtures.FixtureClock;
 import org.apache.isis.applib.fixtures.InstallableFixture;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.services.command.Command;
 import org.apache.isis.applib.services.command.CommandContext;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.config.IsisConfigurationDefault;
diff --git a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/ThrowableMatchers.java b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/ThrowableMatchers.java
index d4a4587..caa2183 100644
--- a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/ThrowableMatchers.java
+++ b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/ThrowableMatchers.java
@@ -18,7 +18,7 @@ package org.apache.isis.core.integtestsupport;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.hamcrest.Description;
 import org.hamcrest.TypeSafeMatcher;
 
diff --git a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/scenarios/ObjectFactoryForIntegration.java b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/scenarios/ObjectFactoryForIntegration.java
index dd56abd..381ad6c 100644
--- a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/scenarios/ObjectFactoryForIntegration.java
+++ b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/scenarios/ObjectFactoryForIntegration.java
@@ -21,8 +21,8 @@ package org.apache.isis.core.integtestsupport.scenarios;
 import java.lang.reflect.Constructor;
 import java.util.Map;
 
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.services.registry.ServiceRegistry;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.core.runtime.headless.IsisSystem;
 
 import cucumber.api.java.ObjectFactory;
diff --git a/core/metamodel-legacy/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceLegacyInternalDefault.java b/core/metamodel-legacy/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceLegacyInternalDefault.java
index ffca0b3..27ba440 100644
--- a/core/metamodel-legacy/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceLegacyInternalDefault.java
+++ b/core/metamodel-legacy/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceLegacyInternalDefault.java
@@ -32,13 +32,13 @@ import org.apache.isis.applib.RepositoryException;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._NullSafe;
 import org.apache.isis.applib.query.Query;
 import org.apache.isis.applib.query.QueryFindAllInstances;
 import org.apache.isis.applib.services.factory.FactoryService;
 import org.apache.isis.applib.services.repository.RepositoryServiceLegacy;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
 import org.apache.isis.applib.services.xactn.TransactionService;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/encoding/FieldType.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/encoding/FieldType.java
index 9309746..6febbfd 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/encoding/FieldType.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/encoding/FieldType.java
@@ -31,7 +31,7 @@ import java.lang.reflect.InvocationTargetException;
 import java.util.HashMap;
 import java.util.Map;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/exceptions/ExceptionUtils.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/exceptions/ExceptionUtils.java
index f684dc8..ce26bd2 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/exceptions/ExceptionUtils.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/exceptions/ExceptionUtils.java
@@ -26,7 +26,7 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 
 /**
  * <p>Provides utilities for manipulating and examining 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/factory/InstanceUtil.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/factory/InstanceUtil.java
index e581d56..bf89622 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/factory/InstanceUtil.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/factory/InstanceUtil.java
@@ -22,7 +22,7 @@ package org.apache.isis.core.commons.factory;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.commons.ensure.Assert;
 import org.apache.isis.core.commons.lang.ObjectExtensions;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ClassUtil.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ClassUtil.java
index 1c1f75f..59611dc 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ClassUtil.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ClassUtil.java
@@ -24,7 +24,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 
 import com.google.common.collect.Maps;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/MethodInvocationPreprocessor.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/MethodInvocationPreprocessor.java
index aba3707..90131b6 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/MethodInvocationPreprocessor.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/MethodInvocationPreprocessor.java
@@ -26,10 +26,10 @@ import java.util.List;
 import java.util.Set;
 import java.util.SortedSet;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Arrays;
-import org.apache.isis.applib.internal.collections._Collections;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Arrays;
+import org.apache.isis.commons.internal.collections._Collections;
 
 /**
  * Utility for method invocation pre-processing.
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ObjectExtensions.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ObjectExtensions.java
index 128d3c5..20b59e3 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ObjectExtensions.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ObjectExtensions.java
@@ -23,7 +23,7 @@ import java.io.IOException;
 import java.lang.reflect.Method;
 import java.util.List;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 
 /**
  * Helpers to co-erce non-generic values into type-safe generics without
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ResourceUtil.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ResourceUtil.java
index 276adcf..95ccee6 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ResourceUtil.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/ResourceUtil.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.commons.lang;
 
 import java.io.InputStream;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 
 /**
  * Adapted from Ibatis Common, now with some additional guava stuff.
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java
index 24c5f7c..d66b21f 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java
@@ -24,8 +24,8 @@ import java.util.Collections;
 import java.util.List;
 import java.util.StringTokenizer;
 
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.util.Enums;
+import org.apache.isis.commons.internal.base._Strings;
 
 import com.google.common.base.Strings;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
index 2cad737..8a5ef7c 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.commons.resource;
 
 import java.io.InputStream;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.commons.lang.StringExtensions;
 
 /**
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/IsisJdoMetamodelPlugin.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/IsisJdoMetamodelPlugin.java
index cad9a87..767abf9 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/IsisJdoMetamodelPlugin.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/IsisJdoMetamodelPlugin.java
@@ -4,7 +4,7 @@ import java.lang.reflect.Method;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 
 public interface IsisJdoMetamodelPlugin {
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/ObjectAdapter.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/ObjectAdapter.java
index ed2b028..bea237f 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/ObjectAdapter.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/ObjectAdapter.java
@@ -25,7 +25,7 @@ import java.util.Map;
 import java.util.function.Function;
 
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.lang.ClassExtensions;
 import org.apache.isis.core.commons.lang.ListExtensions;
 import org.apache.isis.core.commons.lang.MethodExtensions;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/oid/Oid.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/oid/Oid.java
index 5e000cb..c917267 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/oid/Oid.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/adapter/oid/Oid.java
@@ -20,8 +20,8 @@
 package org.apache.isis.core.metamodel.adapter.oid;
 
 import org.apache.isis.applib.annotation.Value;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.services.bookmark.Bookmark;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.core.commons.encoding.Encodable;
 import org.apache.isis.core.metamodel.adapter.version.Version;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/FacetUtil.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/FacetUtil.java
index bf8b727..e8f2a5a 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/FacetUtil.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/FacetUtil.java
@@ -24,8 +24,8 @@ import java.util.Hashtable;
 import java.util.List;
 import java.util.Map;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.base._Casts;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Casts;
 
 import com.google.common.collect.Lists;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/CollectionUtils.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/CollectionUtils.java
index 8c188da..d012d83 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/CollectionUtils.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/CollectionUtils.java
@@ -36,11 +36,11 @@ import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.CopyOnWriteArraySet;
 import java.util.function.Function;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Arrays;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Sets;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Arrays;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Sets;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
 import org.apache.isis.core.metamodel.facets.collections.modify.CollectionFacet;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetedMethod.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetedMethod.java
index bb8fefe..c6016dc 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetedMethod.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetedMethod.java
@@ -25,7 +25,7 @@ import java.util.Collections;
 import java.util.List;
 
 import org.apache.isis.applib.Identifier;
-import org.apache.isis.applib.internal.collections._Arrays;
+import org.apache.isis.commons.internal.collections._Arrays;
 import org.apache.isis.core.commons.lang.StringExtensions;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/PropertyOrCollectionIdentifyingFacetFactoryAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/PropertyOrCollectionIdentifyingFacetFactoryAbstract.java
index 197e407..a773198 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/PropertyOrCollectionIdentifyingFacetFactoryAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/PropertyOrCollectionIdentifyingFacetFactoryAbstract.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.metamodel.facets;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Collections;
+import org.apache.isis.commons.internal.collections._Collections;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 
 public abstract class PropertyOrCollectionIdentifyingFacetFactoryAbstract
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actcoll/typeof/TypeOfFacet.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actcoll/typeof/TypeOfFacet.java
index 9614100..87356ba 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actcoll/typeof/TypeOfFacet.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actcoll/typeof/TypeOfFacet.java
@@ -26,8 +26,8 @@ import java.lang.reflect.Type;
 import java.lang.reflect.TypeVariable;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Arrays;
-import org.apache.isis.applib.internal.collections._Collections;
+import org.apache.isis.commons.internal.collections._Arrays;
+import org.apache.isis.commons.internal.collections._Collections;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.SingleClassValueFacet;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactory.java
index 9707c20..6347a35 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactory.java
@@ -24,8 +24,8 @@ import java.util.List;
 
 import org.apache.isis.applib.annotation.Action;
 import org.apache.isis.applib.events.domain.ActionDomainEvent;
-import org.apache.isis.applib.internal.collections._Collections;
 import org.apache.isis.applib.services.HasTransactionId;
+import org.apache.isis.commons.internal.collections._Collections;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java
index a071efe..fd9f6e5 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java
@@ -32,7 +32,6 @@ import org.apache.isis.applib.NonRecoverableException;
 import org.apache.isis.applib.RecoverableException;
 import org.apache.isis.applib.events.domain.AbstractDomainEvent;
 import org.apache.isis.applib.events.domain.ActionDomainEvent;
-import org.apache.isis.applib.internal.base._Casts;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.services.clock.ClockService;
@@ -46,6 +45,7 @@ import org.apache.isis.applib.services.queryresultscache.QueryResultsCache;
 import org.apache.isis.applib.services.repository.RepositoryService;
 import org.apache.isis.applib.services.xactn.TransactionService;
 import org.apache.isis.applib.services.xactn.TransactionState;
+import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.commons.config.IsisConfiguration;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/CommandUtil.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/CommandUtil.java
index dbbf1b8..a13c4c2 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/CommandUtil.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/CommandUtil.java
@@ -21,9 +21,9 @@ package org.apache.isis.core.metamodel.facets.actions.action.invocation;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Arrays;
 import org.apache.isis.applib.services.bookmark.Bookmark;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Arrays;
 import org.apache.isis.core.commons.lang.StringExtensions;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/defaults/method/ActionDefaultsFacetViaMethodFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/defaults/method/ActionDefaultsFacetViaMethodFactory.java
index 6569bc5..e536dcc 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/defaults/method/ActionDefaultsFacetViaMethodFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/defaults/method/ActionDefaultsFacetViaMethodFactory.java
@@ -22,7 +22,7 @@ package org.apache.isis.core.metamodel.facets.actions.defaults.method;
 import java.lang.reflect.Method;
 import java.util.List;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 import org.apache.isis.core.commons.lang.StringExtensions;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java
index 2644d7a..38673e2 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java
@@ -23,7 +23,7 @@ import java.lang.reflect.Method;
 import java.util.Collections;
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactory.java
index 0c12a93..a31e2eb 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactory.java
@@ -27,7 +27,7 @@ import java.util.List;
 
 import org.apache.isis.applib.annotation.Collection;
 import org.apache.isis.applib.events.domain.CollectionDomainEvent;
-import org.apache.isis.applib.internal.collections._Collections;
+import org.apache.isis.commons.internal.collections._Collections;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/javautilcollection/CollectionFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/javautilcollection/CollectionFacetFactory.java
index 132c6ae..ba3bcef 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/javautilcollection/CollectionFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/javautilcollection/CollectionFacetFactory.java
@@ -19,8 +19,8 @@
 
 package org.apache.isis.core.metamodel.facets.collections.javautilcollection;
 
-import org.apache.isis.applib.internal.collections._Arrays;
-import org.apache.isis.applib.internal.collections._Collections;
+import org.apache.isis.commons.internal.collections._Arrays;
+import org.apache.isis.commons.internal.collections._Collections;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/choices/ChoicesFacetFromBoundedAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/choices/ChoicesFacetFromBoundedAbstract.java
index ffe500d..9b2022d 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/choices/ChoicesFacetFromBoundedAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/choices/ChoicesFacetFromBoundedAbstract.java
@@ -21,12 +21,12 @@ package org.apache.isis.core.metamodel.facets.object.choices;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Arrays;
 import org.apache.isis.applib.query.Query;
 import org.apache.isis.applib.query.QueryFindAllInstances;
 import org.apache.isis.applib.services.wrapper.events.UsabilityEvent;
 import org.apache.isis.applib.services.wrapper.events.ValidityEvent;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Arrays;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/auditing/AuditableFacetForDomainObjectAnnotation.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/auditing/AuditableFacetForDomainObjectAnnotation.java
index 3b0319b..3173551 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/auditing/AuditableFacetForDomainObjectAnnotation.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/auditing/AuditableFacetForDomainObjectAnnotation.java
@@ -23,7 +23,7 @@ import java.util.List;
 
 import org.apache.isis.applib.annotation.Auditing;
 import org.apache.isis.applib.annotation.DomainObject;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.object.audit.AuditableFacet;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/publishing/PublishedObjectFacetForDomainObjectAnnotation.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/publishing/PublishedObjectFacetForDomainObjectAnnotation.java
index ab942c4..ca57366 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/publishing/PublishedObjectFacetForDomainObjectAnnotation.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/publishing/PublishedObjectFacetForDomainObjectAnnotation.java
@@ -23,7 +23,7 @@ import java.util.List;
 
 import org.apache.isis.applib.annotation.DomainObject;
 import org.apache.isis.applib.annotation.Publishing;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.object.publishedobject.PublishedObjectFacet;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/DomainServiceMenuOrder.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/DomainServiceMenuOrder.java
index 161c13c..89735d0 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/DomainServiceMenuOrder.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/DomainServiceMenuOrder.java
@@ -22,7 +22,7 @@ package org.apache.isis.core.metamodel.facets.object.domainservice;
 import org.apache.isis.applib.annotation.Constants;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.DomainServiceLayout;
-import org.apache.isis.applib.internal.compare._Comparators;
+import org.apache.isis.commons.internal.compare._Comparators;
 
 public class DomainServiceMenuOrder {
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ignore/javalang/RemoveMethodsFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ignore/javalang/RemoveMethodsFacetFactory.java
index b65c031..aee00c1 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ignore/javalang/RemoveMethodsFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ignore/javalang/RemoveMethodsFacetFactory.java
@@ -25,7 +25,7 @@ import java.util.List;
 
 import com.google.common.collect.Lists;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 import org.apache.isis.core.commons.lang.ClassExtensions;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/membergroups/annotprop/MemberGroupLayoutFacetProperties.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/membergroups/annotprop/MemberGroupLayoutFacetProperties.java
index 3aa838d..0c23178 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/membergroups/annotprop/MemberGroupLayoutFacetProperties.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/membergroups/annotprop/MemberGroupLayoutFacetProperties.java
@@ -24,7 +24,7 @@ import java.util.Properties;
 import java.util.stream.Collectors;
 
 import org.apache.isis.applib.annotation.MemberGroupLayout.ColumnSpans;
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.object.membergroups.MemberGroupLayoutFacetAbstract;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java
index 76f9a12..dafc8ee 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java
@@ -23,7 +23,7 @@ import java.lang.reflect.Method;
 import java.util.List;
 
 import org.apache.isis.applib.annotation.PropertyLayout;
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetDeclarativeInitializingAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetDeclarativeInitializingAbstract.java
index b90428b..c4660d8 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetDeclarativeInitializingAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetDeclarativeInitializingAbstract.java
@@ -23,9 +23,9 @@ import java.util.List;
 import java.util.Set;
 import java.util.UUID;
 
-import org.apache.isis.applib.internal.memento._Mementos;
-import org.apache.isis.applib.internal.memento._Mementos.SerializingAdapter;
 import org.apache.isis.applib.services.urlencoding.UrlEncodingService;
+import org.apache.isis.commons.internal.memento._Mementos;
+import org.apache.isis.commons.internal.memento._Mementos.SerializingAdapter;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
 import org.apache.isis.core.metamodel.adapter.oid.Oid;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/autocomplete/method/ActionParameterAutoCompleteFacetViaMethod.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/autocomplete/method/ActionParameterAutoCompleteFacetViaMethod.java
index 40dcbb3..1cf04f8 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/autocomplete/method/ActionParameterAutoCompleteFacetViaMethod.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/autocomplete/method/ActionParameterAutoCompleteFacetViaMethod.java
@@ -23,8 +23,8 @@ import java.lang.reflect.Method;
 import java.util.Collections;
 import java.util.List;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/enums/ActionParameterChoicesFacetDerivedFromChoicesFacet.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/enums/ActionParameterChoicesFacetDerivedFromChoicesFacet.java
index 1c899f5..67a6245 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/enums/ActionParameterChoicesFacetDerivedFromChoicesFacet.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/enums/ActionParameterChoicesFacetDerivedFromChoicesFacet.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.metamodel.facets.param.choices.enums;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethod.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethod.java
index c33a6ad..bb3cf82 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethod.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethod.java
@@ -23,7 +23,7 @@ import java.lang.reflect.Method;
 import java.util.Collections;
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethodFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethodFactory.java
index 4222df7..e556973 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethodFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/method/ActionChoicesFacetViaMethodFactory.java
@@ -22,7 +22,7 @@ package org.apache.isis.core.metamodel.facets.param.choices.method;
 import java.lang.reflect.Method;
 import java.util.Collection;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 import org.apache.isis.core.commons.lang.StringExtensions;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/methodnum/ActionParameterChoicesFacetViaMethod.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/methodnum/ActionParameterChoicesFacetViaMethod.java
index 856550d..b528058 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/methodnum/ActionParameterChoicesFacetViaMethod.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/choices/methodnum/ActionParameterChoicesFacetViaMethod.java
@@ -23,8 +23,8 @@ import java.lang.reflect.Method;
 import java.util.Collections;
 import java.util.List;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/mandatory/MandatoryFacetInvertedByNullableAnnotationOnParameter.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/mandatory/MandatoryFacetInvertedByNullableAnnotationOnParameter.java
index dc78bff..511255b 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/mandatory/MandatoryFacetInvertedByNullableAnnotationOnParameter.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/mandatory/MandatoryFacetInvertedByNullableAnnotationOnParameter.java
@@ -23,7 +23,7 @@ import java.util.List;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.FacetedMethodParameter;
 import org.apache.isis.core.metamodel.facets.objectvalue.mandatory.MandatoryFacet;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/autocomplete/method/PropertyAutoCompleteFacetMethod.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/autocomplete/method/PropertyAutoCompleteFacetMethod.java
index 2a5a582..6e054ca 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/autocomplete/method/PropertyAutoCompleteFacetMethod.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/autocomplete/method/PropertyAutoCompleteFacetMethod.java
@@ -26,7 +26,7 @@ import java.util.List;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/choices/enums/PropertyChoicesFacetDerivedFromChoicesFacet.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/choices/enums/PropertyChoicesFacetDerivedFromChoicesFacet.java
index 67c4ef7..eedbb47 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/choices/enums/PropertyChoicesFacetDerivedFromChoicesFacet.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/choices/enums/PropertyChoicesFacetDerivedFromChoicesFacet.java
@@ -19,7 +19,7 @@
 
 package org.apache.isis.core.metamodel.facets.properties.choices.enums;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTemporal.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTemporal.java
index 41cd71a..091d7e7 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTemporal.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTemporal.java
@@ -33,7 +33,7 @@ import java.util.TimeZone;
 import com.google.common.collect.Maps;
 
 import org.apache.isis.applib.adapters.EncodingException;
-import org.apache.isis.applib.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.core.commons.config.ConfigurationConstants;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.facetapi.Facet;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/timestampsql/JavaSqlTimeStampValueSemanticsProvider.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/timestampsql/JavaSqlTimeStampValueSemanticsProvider.java
index 1e3cfb8..8d7007c 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/timestampsql/JavaSqlTimeStampValueSemanticsProvider.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/timestampsql/JavaSqlTimeStampValueSemanticsProvider.java
@@ -26,7 +26,7 @@ import java.util.Map;
 
 import org.apache.isis.applib.adapters.EncoderDecoder;
 import org.apache.isis.applib.adapters.Parser;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.object.parseable.InvalidEntryException;
 import org.apache.isis.core.metamodel.facets.properties.defaults.PropertyDefaultFacet;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/treenode/TreeNodeValueSemanticsProvider.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/treenode/TreeNodeValueSemanticsProvider.java
index fcd12f7..9d70b8e 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/treenode/TreeNodeValueSemanticsProvider.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/value/treenode/TreeNodeValueSemanticsProvider.java
@@ -22,13 +22,13 @@ package org.apache.isis.core.metamodel.facets.value.treenode;
 import org.apache.isis.applib.adapters.DefaultsProvider;
 import org.apache.isis.applib.adapters.EncoderDecoder;
 import org.apache.isis.applib.adapters.Parser;
-import org.apache.isis.applib.internal.memento._Mementos;
-import org.apache.isis.applib.internal.memento._Mementos.Memento;
-import org.apache.isis.applib.internal.memento._Mementos.SerializingAdapter;
 import org.apache.isis.applib.services.urlencoding.UrlEncodingService;
 import org.apache.isis.applib.tree.LazyTreeNode;
 import org.apache.isis.applib.tree.TreeNode;
 import org.apache.isis.applib.tree.TreeState;
+import org.apache.isis.commons.internal.memento._Mementos;
+import org.apache.isis.commons.internal.memento._Mementos.Memento;
+import org.apache.isis.commons.internal.memento._Mementos.SerializingAdapter;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.object.value.vsp.ValueSemanticsProviderAndFacetAbstract;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/layout/memberorderfacet/MemberOrderFacetComparator.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/layout/memberorderfacet/MemberOrderFacetComparator.java
index 4eefcf7..ad89ec0 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/layout/memberorderfacet/MemberOrderFacetComparator.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/layout/memberorderfacet/MemberOrderFacetComparator.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.metamodel.layout.memberorderfacet;
 
 import java.util.Comparator;
 
-import org.apache.isis.applib.internal.compare._Comparators;
+import org.apache.isis.commons.internal.compare._Comparators;
 import org.apache.isis.core.metamodel.facets.members.order.MemberOrderFacet;
 
 public class MemberOrderFacetComparator implements Comparator<MemberOrderFacet> {
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelPlugin.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelPlugin.java
index 2ea8a81..66f83ce 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelPlugin.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelPlugin.java
@@ -22,8 +22,8 @@ import java.util.Collections;
 import java.util.Objects;
 import java.util.Set;
 
-import org.apache.isis.applib.internal.collections._Multimaps;
-import org.apache.isis.applib.internal.collections._Multimaps.SetMultimap;
+import org.apache.isis.commons.internal.collections._Multimaps;
+import org.apache.isis.commons.internal.collections._Multimaps.SetMultimap;
 import org.apache.isis.core.metamodel.facets.FacetFactory;
 
 public interface ProgrammingModelPlugin {
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java
index fb372e0..ea21cb7 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java
@@ -27,13 +27,13 @@ import java.util.function.Predicate;
 import java.util.stream.Collectors;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Collections;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.collections._Multimaps;
-import org.apache.isis.applib.internal.collections._Multimaps.ListMultimap;
 import org.apache.isis.applib.services.exceprecog.ExceptionRecognizer;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Collections;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Multimaps;
+import org.apache.isis.commons.internal.collections._Multimaps.ListMultimap;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.commons.components.ApplicationScopedComponent;
 import org.apache.isis.core.commons.config.IsisConfiguration;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/bookmarks/BookmarkServiceInternalDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/bookmarks/BookmarkServiceInternalDefault.java
index 14c4edc..d388502 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/bookmarks/BookmarkServiceInternalDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/bookmarks/BookmarkServiceInternalDefault.java
@@ -30,16 +30,16 @@ import javax.inject.Inject;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Sets;
-import org.apache.isis.applib.internal.memento._Mementos.SerializingAdapter;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkHolder;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.services.registry.ServiceRegistry;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
 import org.apache.isis.applib.tree.TreeState;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Sets;
+import org.apache.isis.commons.internal.memento._Mementos.SerializingAdapter;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
 import org.apache.isis.core.runtime.persistence.ObjectNotFoundException;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/config/ConfigurationServiceDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/config/ConfigurationServiceDefault.java
index bf21966..3c2b894 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/config/ConfigurationServiceDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/config/ConfigurationServiceDefault.java
@@ -31,11 +31,11 @@ import javax.annotation.PostConstruct;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.collections._Sets;
 import org.apache.isis.applib.services.config.ConfigurationProperty;
 import org.apache.isis.applib.services.config.ConfigurationService;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Sets;
 import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.slf4j.Logger;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/factory/FactoryServiceInternalDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/factory/FactoryServiceInternalDefault.java
index 6cb9502..2dc46c1 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/factory/FactoryServiceInternalDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/factory/FactoryServiceInternalDefault.java
@@ -26,9 +26,9 @@ import org.apache.isis.applib.NonRecoverableException;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._Casts;
 import org.apache.isis.applib.services.factory.FactoryService;
 import org.apache.isis.applib.services.registry.ServiceRegistry;
+import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.facets.object.mixin.MixinFacet;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/grid/GridLoaderServiceDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/grid/GridLoaderServiceDefault.java
index 72a6363..c35482c 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/grid/GridLoaderServiceDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/grid/GridLoaderServiceDefault.java
@@ -38,12 +38,12 @@ import org.slf4j.LoggerFactory;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal._Constants;
 import org.apache.isis.applib.layout.grid.Grid;
 import org.apache.isis.applib.services.grid.GridLoaderService;
 import org.apache.isis.applib.services.grid.GridSystemService;
 import org.apache.isis.applib.services.jaxb.JaxbService;
 import org.apache.isis.applib.services.message.MessageService;
+import org.apache.isis.commons.internal._Constants;
 import org.apache.isis.core.metamodel.deployment.DeploymentCategoryProvider;
 
 @DomainService(
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceInternalDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceInternalDefault.java
index fe536d0..6e0d1d5 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceInternalDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/repository/RepositoryServiceInternalDefault.java
@@ -33,13 +33,13 @@ import org.apache.isis.applib.RepositoryException;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._NullSafe;
 import org.apache.isis.applib.query.Query;
 import org.apache.isis.applib.query.QueryFindAllInstances;
 import org.apache.isis.applib.services.factory.FactoryService;
 import org.apache.isis.applib.services.repository.RepositoryService;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
 import org.apache.isis.applib.services.xactn.TransactionService;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/SwaggerServiceDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/SwaggerServiceDefault.java
index e0b4f9d..40e0280 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/SwaggerServiceDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/SwaggerServiceDefault.java
@@ -25,9 +25,9 @@ import javax.annotation.PostConstruct;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.resources._Resource;
 import org.apache.isis.applib.services.swagger.SwaggerService;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.resources._Resource;
 import org.apache.isis.core.metamodel.services.swagger.internal.SwaggerSpecGenerator;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 import org.slf4j.Logger;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyFactory.java
index f260eed..9a2758c 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyFactory.java
@@ -29,7 +29,7 @@ import java.util.function.Supplier;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 import org.apache.isis.core.metamodel.services.swagger.internal.ValuePropertyPlugin.ValuePropertyCollector;
 import org.joda.time.DateTime;
 import org.joda.time.LocalDate;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyPlugin.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyPlugin.java
index b55cb6b..ed83f01 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyPlugin.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/swagger/internal/ValuePropertyPlugin.java
@@ -4,7 +4,7 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.function.BiConsumer;
 
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.core.metamodel.services.swagger.internal.ValuePropertyFactory.Factory;
 
 public interface ValuePropertyPlugin {
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/spec/feature/ObjectAction.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/spec/feature/ObjectAction.java
index 3a33503..c4d16a4 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/spec/feature/ObjectAction.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/spec/feature/ObjectAction.java
@@ -34,10 +34,10 @@ import org.apache.isis.applib.annotation.InvokeOn;
 import org.apache.isis.applib.annotation.PromptStyle;
 import org.apache.isis.applib.annotation.SemanticsOf;
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.value.Blob;
 import org.apache.isis.applib.value.Clob;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.consent.Consent;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/CollectionUtils.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/CollectionUtils.java
index ce23a27..8d64382 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/CollectionUtils.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/CollectionUtils.java
@@ -23,8 +23,8 @@ import java.lang.reflect.Type;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.collections._Arrays;
-import org.apache.isis.applib.internal.collections._Collections;
+import org.apache.isis.commons.internal.collections._Arrays;
+import org.apache.isis.commons.internal.collections._Collections;
 
 /**
  * Defines the types which are considered to be collections.
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/ObjectActionDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/ObjectActionDefault.java
index e0bf780..48827cc 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/ObjectActionDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/ObjectActionDefault.java
@@ -34,11 +34,11 @@ import org.apache.isis.applib.RecoverableException;
 import org.apache.isis.applib.annotation.InvokedOn;
 import org.apache.isis.applib.annotation.SemanticsOf;
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.collections._Lists;
 
 import com.google.common.base.Predicate;
 import org.apache.isis.applib.services.command.Command;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.exceptions.UnknownTypeException;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.consent.Consent;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/OneToOneAssociationDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/OneToOneAssociationDefault.java
index f04c362..f46e8f1 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/OneToOneAssociationDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/OneToOneAssociationDefault.java
@@ -24,8 +24,8 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.base._NullSafe;
 import org.apache.isis.applib.services.command.Command;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.commons.util.ToString;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/util/DeweyOrderComparator.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/util/DeweyOrderComparator.java
index 92a8520..f037b24 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/util/DeweyOrderComparator.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/util/DeweyOrderComparator.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.metamodel.util;
 
 import java.util.Comparator;
 
-import org.apache.isis.applib.internal.compare._Comparators;
+import org.apache.isis.commons.internal.compare._Comparators;
 
 public class DeweyOrderComparator implements Comparator<String> {
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/threadpool/ThreadPoolSupport.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/threadpool/ThreadPoolSupport.java
index 0454e72..03467c2 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/threadpool/ThreadPoolSupport.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/threadpool/ThreadPoolSupport.java
@@ -29,8 +29,8 @@ import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.context._Context;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java b/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java
index 6456948..72f815e 100644
--- a/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java
+++ b/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java
@@ -20,7 +20,7 @@ package org.apache.isis.progmodels.dflt;
 import java.util.List;
 import java.util.Set;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facets.actions.action.ActionAnnotationFacetFactory;
 import org.apache.isis.core.metamodel.facets.actions.action.ActionChoicesForCollectionParameterFacetFactory;
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/Utils.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/Utils.java
index 8144527..4db96c3 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/Utils.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/Utils.java
@@ -22,7 +22,7 @@ package org.apache.isis.core.metamodel.facets;
 import java.lang.reflect.Method;
 import java.util.List;
 
-import org.apache.isis.applib.internal._Constants;
+import org.apache.isis.commons.internal._Constants;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 
 class Utils {
diff --git a/core/plugins/codegen-bytebuddy/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingByteBuddy.java b/core/plugins/codegen-bytebuddy/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingByteBuddy.java
index e8e80c6..dbe3da7 100644
--- a/core/plugins/codegen-bytebuddy/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingByteBuddy.java
+++ b/core/plugins/codegen-bytebuddy/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingByteBuddy.java
@@ -3,7 +3,7 @@ package org.apache.isis.core.plugins.codegen;
 import java.lang.reflect.Method;
 import java.util.function.Predicate;
 
-import org.apache.isis.applib.internal.exceptions._Exceptions;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.core.plugins.codegen.ProxyFactory;
 import org.apache.isis.core.plugins.codegen.ProxyFactoryPlugin;
 
diff --git a/core/plugins/codegen-javassist/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingJavassist.java b/core/plugins/codegen-javassist/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingJavassist.java
index 8e20ed5..5132a66 100644
--- a/core/plugins/codegen-javassist/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingJavassist.java
+++ b/core/plugins/codegen-javassist/src/main/java/org/apache/isis/core/plugins/codegen/ProxyFactoryPluginUsingJavassist.java
@@ -7,9 +7,9 @@ import java.util.function.Predicate;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.plugins.codegen.ProxyFactory;
 import org.apache.isis.core.plugins.codegen.ProxyFactoryPlugin;
diff --git a/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ClassDiscoveryPluginUsingReflections.java b/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ClassDiscoveryPluginUsingReflections.java
index 2703723..26effdd 100644
--- a/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ClassDiscoveryPluginUsingReflections.java
+++ b/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ClassDiscoveryPluginUsingReflections.java
@@ -2,7 +2,7 @@ package org.apache.isis.core.plugins.classdiscovery.reflections;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.plugins.classdiscovery.ClassDiscovery;
 import org.apache.isis.core.plugins.classdiscovery.ClassDiscoveryPlugin;
 import org.reflections.scanners.SubTypesScanner;
diff --git a/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ReflectDiscovery.java b/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ReflectDiscovery.java
index 2337570..a5c18f6 100644
--- a/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ReflectDiscovery.java
+++ b/core/plugins/discovery-reflections/src/main/java/org/apache/isis/core/plugins/classdiscovery/reflections/ReflectDiscovery.java
@@ -10,7 +10,7 @@ import java.util.stream.Stream;
 
 import javax.validation.constraints.NotNull;
 
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.plugins.classdiscovery.ClassDiscovery;
 import org.reflections.Reflections;
 
diff --git a/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession4.java b/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession4.java
index f385ec8..f353410 100644
--- a/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession4.java
+++ b/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession4.java
@@ -40,14 +40,14 @@ import javax.jdo.identity.SingleFieldIdentity;
 import javax.jdo.listener.InstanceLifecycleListener;
 
 import org.apache.isis.applib.events.lifecycle.AbstractLifecycleEvent;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.query.Query;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.services.command.Command;
 import org.apache.isis.applib.services.exceprecog.ExceptionRecognizer;
 import org.apache.isis.applib.services.iactn.Interaction;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.ensure.Assert;
 import org.apache.isis.core.commons.ensure.IsisAssertException;
diff --git a/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java b/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java
index fcfb0d8..a1b5feb 100644
--- a/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java
+++ b/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java
@@ -33,7 +33,7 @@ import javax.jdo.identity.LongIdentity;
 import javax.jdo.identity.ObjectIdentity;
 import javax.jdo.identity.StringIdentity;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.metamodel.adapter.oid.RootOid;
 import org.apache.isis.core.metamodel.spec.ObjectSpecId;
 import org.apache.isis.core.metamodel.spec.ObjectSpecification;
diff --git a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession5.java b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession5.java
index 56c525e..91c99ca 100644
--- a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession5.java
+++ b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSession5.java
@@ -40,15 +40,15 @@ import javax.jdo.identity.SingleFieldIdentity;
 import javax.jdo.listener.InstanceLifecycleListener;
 
 import org.apache.isis.applib.events.lifecycle.AbstractLifecycleEvent;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
-import org.apache.isis.applib.internal.exceptions._Exceptions;
 import org.apache.isis.applib.query.Query;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.services.command.Command;
 import org.apache.isis.applib.services.exceprecog.ExceptionRecognizer;
 import org.apache.isis.applib.services.iactn.Interaction;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.commons.internal.exceptions._Exceptions;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.ensure.Assert;
 import org.apache.isis.core.commons.ensure.IsisAssertException;
diff --git a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java
index b4e709f..29c19d1 100644
--- a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java
+++ b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/objectstore/jdo/datanucleus/persistence/spi/JdoObjectIdSerializer.java
@@ -33,7 +33,7 @@ import javax.jdo.identity.LongIdentity;
 import javax.jdo.identity.ObjectIdentity;
 import javax.jdo.identity.StringIdentity;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.metamodel.adapter.oid.RootOid;
 import org.apache.isis.core.metamodel.spec.ObjectSpecId;
 import org.apache.isis.core.metamodel.spec.ObjectSpecification;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/metamodel/IsisJdoRuntimePlugin.java b/core/runtime/src/main/java/org/apache/isis/core/metamodel/IsisJdoRuntimePlugin.java
index d59776f..c6041b0 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/metamodel/IsisJdoRuntimePlugin.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/metamodel/IsisJdoRuntimePlugin.java
@@ -1,6 +1,6 @@
 package org.apache.isis.core.metamodel;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.runtime.system.persistence.PersistenceSessionFactory;
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/memento/Memento.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/memento/Memento.java
index bf65edb..b91ab0c 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/memento/Memento.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/memento/Memento.java
@@ -22,7 +22,7 @@ package org.apache.isis.core.runtime.memento;
 import java.io.Serializable;
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.ensure.Assert;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.commons.exceptions.UnknownTypeException;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java
index a43a71f..16ea447 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java
@@ -28,7 +28,7 @@ import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;
 import javax.enterprise.context.RequestScoped;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.factory.InstanceCreationClassException;
 import org.apache.isis.core.commons.factory.InstanceCreationException;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java
index 2713d4a..e14eb19 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java
@@ -33,7 +33,7 @@ import javax.annotation.PreDestroy;
 import org.apache.isis.applib.AppManifest;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.DomainServiceLayout;
-import org.apache.isis.applib.internal.discover._Discover;
+import org.apache.isis.commons.internal.discover._Discover;
 import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.facets.object.domainservice.DomainServiceMenuOrder;
 import org.apache.isis.core.metamodel.util.DeweyOrderComparator;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/background/BackgroundServiceDefault.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/background/BackgroundServiceDefault.java
index e9aa480..d3010fe 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/background/BackgroundServiceDefault.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/background/BackgroundServiceDefault.java
@@ -28,14 +28,14 @@ import javax.annotation.PreDestroy;
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.base._Casts;
 import org.apache.isis.applib.services.background.BackgroundCommandService;
 import org.apache.isis.applib.services.background.BackgroundCommandService2;
 import org.apache.isis.applib.services.background.BackgroundService2;
 import org.apache.isis.applib.services.command.Command;
 import org.apache.isis.applib.services.command.CommandContext;
 import org.apache.isis.applib.services.factory.FactoryService;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.core.commons.lang.ArrayExtensions;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java
index 3e4bf99..3c8ebb8 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.runtime.system.context;
 
 import java.util.Optional;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java
index 3de3097..d10abe5 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java
@@ -6,8 +6,6 @@ import java.util.Map;
 import javax.jdo.PersistenceManager;
 import javax.jdo.PersistenceManagerFactory;
 
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
 import org.apache.isis.applib.services.clock.ClockService;
 import org.apache.isis.applib.services.command.CommandContext;
 import org.apache.isis.applib.services.command.spi.CommandService;
@@ -16,6 +14,8 @@ import org.apache.isis.applib.services.factory.FactoryService;
 import org.apache.isis.applib.services.iactn.InteractionContext;
 import org.apache.isis.applib.services.metrics.MetricsService;
 import org.apache.isis.applib.services.user.UserService;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.util.ToString;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java
index 2663f3a..21daeb0 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java
@@ -30,8 +30,8 @@ import org.apache.isis.applib.AppManifest;
 import org.apache.isis.applib.clock.Clock;
 import org.apache.isis.applib.fixtures.FixtureClock;
 import org.apache.isis.applib.fixturescripts.FixtureScripts;
-import org.apache.isis.applib.internal.context._Context;
 import org.apache.isis.applib.services.fixturespec.FixtureScriptsDefault;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.commons.lang.ListExtensions;
 import org.apache.isis.core.metamodel.deployment.DeploymentCategory;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java
index 278c64f..84a86c9 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java
@@ -32,7 +32,7 @@ import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.Mixin;
 import org.apache.isis.applib.annotation.Nature;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.internal.discover._Discover;
+import org.apache.isis.commons.internal.discover._Discover;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.commons.factory.InstanceUtil;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/PersistenceCapableTypeFinder.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/PersistenceCapableTypeFinder.java
index 8f4f92d..2559cb9 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/PersistenceCapableTypeFinder.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/PersistenceCapableTypeFinder.java
@@ -25,7 +25,7 @@ import java.util.Set;
 
 import javax.jdo.annotations.PersistenceCapable;
 
-import org.apache.isis.applib.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.core.plugins.classdiscovery.ClassDiscovery;
 
 /**
diff --git a/core/specsupport/src/main/java/org/apache/isis/core/specsupport/scenarios/ScenarioExecutionScope.java b/core/specsupport/src/main/java/org/apache/isis/core/specsupport/scenarios/ScenarioExecutionScope.java
index 42a3e54..4f499a3 100644
--- a/core/specsupport/src/main/java/org/apache/isis/core/specsupport/scenarios/ScenarioExecutionScope.java
+++ b/core/specsupport/src/main/java/org/apache/isis/core/specsupport/scenarios/ScenarioExecutionScope.java
@@ -16,7 +16,7 @@
  */
 package org.apache.isis.core.specsupport.scenarios;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 
 /**
  * The scope at which the specification will run; acts as a factory to create
diff --git a/core/specsupport/src/main/java/org/apache/isis/core/specsupport/specs/CukeGlueAbstract.java b/core/specsupport/src/main/java/org/apache/isis/core/specsupport/specs/CukeGlueAbstract.java
index 8087f43..71ba7e7 100644
--- a/core/specsupport/src/main/java/org/apache/isis/core/specsupport/specs/CukeGlueAbstract.java
+++ b/core/specsupport/src/main/java/org/apache/isis/core/specsupport/specs/CukeGlueAbstract.java
@@ -24,8 +24,8 @@ import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.util.List;
 
-import org.apache.isis.applib.internal.base._Strings;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
+import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.core.specsupport.scenarios.ScenarioExecution;
 import org.apache.isis.core.specsupport.scenarios.ScenarioExecutionForUnit;
 import org.apache.isis.core.specsupport.scenarios.ScenarioExecutionScope;
diff --git a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/JsonRepresentation.java b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/JsonRepresentation.java
index 6e5f462..10b4bff 100644
--- a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/JsonRepresentation.java
+++ b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/JsonRepresentation.java
@@ -36,9 +36,9 @@ import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.viewer.restfulobjects.applib.util.JsonNodeUtils;
 import org.apache.isis.viewer.restfulobjects.applib.util.PathNode;
 import org.apache.isis.viewer.restfulobjects.applib.util.UrlEncodingUtils;
diff --git a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/RestfulResponse.java b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/RestfulResponse.java
index 2429668..01c2b5e 100644
--- a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/RestfulResponse.java
+++ b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/RestfulResponse.java
@@ -32,7 +32,7 @@ import javax.ws.rs.core.Response.Status;
 import javax.ws.rs.core.Response.Status.Family;
 import javax.ws.rs.core.Response.StatusType;
 
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.viewer.restfulobjects.applib.JsonRepresentation;
 import org.apache.isis.viewer.restfulobjects.applib.RepresentationType;
 import org.apache.isis.viewer.restfulobjects.applib.util.JsonMapper;
diff --git a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/UriBuilderPlugin.java b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/UriBuilderPlugin.java
index 76e86d9..2bc774b 100644
--- a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/UriBuilderPlugin.java
+++ b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/client/UriBuilderPlugin.java
@@ -2,7 +2,7 @@ package org.apache.isis.viewer.restfulobjects.applib.client;
 
 import javax.ws.rs.core.UriBuilder;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 
 public interface UriBuilderPlugin {
 
diff --git a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/MediaTypes.java b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/MediaTypes.java
index 7716113..442b917 100644
--- a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/MediaTypes.java
+++ b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/MediaTypes.java
@@ -24,7 +24,7 @@ import java.util.stream.Collectors;
 
 import javax.ws.rs.core.MediaType;
 
-import org.apache.isis.applib.internal.base._Strings;
+import org.apache.isis.commons.internal.base._Strings;
 
 public class MediaTypes {
 
diff --git a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/Parser.java b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/Parser.java
index 98bacfa..3bc96d9 100644
--- a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/Parser.java
+++ b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/Parser.java
@@ -29,10 +29,10 @@ import java.util.stream.Collectors;
 import javax.ws.rs.core.CacheControl;
 import javax.ws.rs.core.MediaType;
 
-import org.apache.isis.applib.internal._Constants;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal._Constants;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.viewer.restfulobjects.applib.JsonRepresentation;
 
 import com.google.common.base.Function;
diff --git a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/PathNode.java b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/PathNode.java
index 245e7f9..cf3b49a 100644
--- a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/PathNode.java
+++ b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/PathNode.java
@@ -26,9 +26,9 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.base._Strings;
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.collections._Maps;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.viewer.restfulobjects.applib.JsonRepresentation;
 
 import com.google.common.base.Splitter;
diff --git a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/UrlEncodingUtils.java b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/UrlEncodingUtils.java
index e74f660..8b1a4c8 100644
--- a/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/UrlEncodingUtils.java
+++ b/core/viewer-restfulobjects-applib/src/main/java/org/apache/isis/viewer/restfulobjects/applib/util/UrlEncodingUtils.java
@@ -28,8 +28,8 @@ import java.util.function.Function;
 
 import com.fasterxml.jackson.databind.JsonNode;
 
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.viewer.restfulobjects.applib.JsonRepresentation;
 
 public final class UrlEncodingUtils {
diff --git a/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/IsisJaxrsServerPlugin.java b/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/IsisJaxrsServerPlugin.java
index a6d3a75..ea88453 100644
--- a/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/IsisJaxrsServerPlugin.java
+++ b/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/IsisJaxrsServerPlugin.java
@@ -1,6 +1,6 @@
 package org.apache.isis.viewer.restfulobjects.server;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 import org.apache.isis.viewer.restfulobjects.applib.client.RestfulResponse.HttpStatusCode;
 
 public interface IsisJaxrsServerPlugin {
diff --git a/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/RestfulObjectsApplication.java b/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/RestfulObjectsApplication.java
index 3f5864a..01180eb 100644
--- a/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/RestfulObjectsApplication.java
+++ b/core/viewer-restfulobjects-server/src/main/java/org/apache/isis/viewer/restfulobjects/server/RestfulObjectsApplication.java
@@ -18,7 +18,7 @@
  */
 package org.apache.isis.viewer.restfulobjects.server;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.viewer.restfulobjects.rendering.service.acceptheader.AcceptHeaderServiceForRest;
 import org.apache.isis.viewer.restfulobjects.server.mappers.ExceptionMapperForObjectNotFound;
 import org.apache.isis.viewer.restfulobjects.server.mappers.ExceptionMapperForRestfulObjectsApplication;
diff --git a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java
index 17719fa..b60ee44 100644
--- a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java
+++ b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java
@@ -31,9 +31,9 @@ import java.util.concurrent.Callable;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.context._Context;
-import org.apache.isis.applib.internal.resources._Resource;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.commons.internal.resources._Resource;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.config.IsisConfigurationDefault;
diff --git a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/registries/components/ComponentFactoryRegistrarDefault.java b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/registries/components/ComponentFactoryRegistrarDefault.java
index 52c2c44..7816777 100644
--- a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/registries/components/ComponentFactoryRegistrarDefault.java
+++ b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/registries/components/ComponentFactoryRegistrarDefault.java
@@ -21,7 +21,7 @@ package org.apache.isis.viewer.wicket.viewer.registries.components;
 
 import java.util.ServiceLoader;
 
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.context._Plugin;
 import org.apache.isis.viewer.wicket.ui.ComponentFactory;
 import org.apache.isis.viewer.wicket.ui.app.registry.ComponentFactoryRegistrar;
 import org.apache.isis.viewer.wicket.ui.components.about.AboutPanelFactory;
diff --git a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/mementos/ObjectAdapterMemento.java b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/mementos/ObjectAdapterMemento.java
index d6dc59d..253c463 100644
--- a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/mementos/ObjectAdapterMemento.java
+++ b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/mementos/ObjectAdapterMemento.java
@@ -27,9 +27,9 @@ import java.util.function.Function;
 
 import javax.annotation.Nullable;
 
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.hint.HintStore;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager.ConcurrencyChecking;
diff --git a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ActionModel.java b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ActionModel.java
index a11cc3e..7b08cd2 100644
--- a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ActionModel.java
+++ b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ActionModel.java
@@ -32,12 +32,12 @@ import org.apache.isis.applib.Identifier;
 import org.apache.isis.applib.annotation.BookmarkPolicy;
 import org.apache.isis.applib.annotation.PromptStyle;
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.services.routing.RoutingService;
 import org.apache.isis.applib.value.Blob;
 import org.apache.isis.applib.value.Clob;
 import org.apache.isis.applib.value.LocalResourcePath;
 import org.apache.isis.applib.value.NamedWithMimeType;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager.ConcurrencyChecking;
 import org.apache.isis.core.metamodel.adapter.oid.OidMarshaller;
diff --git a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/EntityCollectionModel.java b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/EntityCollectionModel.java
index b09ceaf..b15b781 100644
--- a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/EntityCollectionModel.java
+++ b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/EntityCollectionModel.java
@@ -28,10 +28,10 @@ import java.util.Map;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.layout.component.CollectionLayoutData;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.factory.InstanceUtil;
 import org.apache.isis.core.commons.lang.ClassUtil;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ScalarModel.java b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ScalarModel.java
index b92f239..bfd7fd1 100644
--- a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ScalarModel.java
+++ b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/ScalarModel.java
@@ -28,7 +28,7 @@ import java.util.stream.Collectors;
 
 import org.apache.isis.applib.annotation.PromptStyle;
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.base._NullSafe;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/Util.java b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/Util.java
index 52de9fc..6f478e8 100644
--- a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/Util.java
+++ b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/Util.java
@@ -21,7 +21,7 @@ package org.apache.isis.viewer.wicket.model.models;
 
 import java.util.Optional;
 
-import org.apache.isis.applib.internal.base._Reduction;
+import org.apache.isis.commons.internal.base._Reduction;
 
 class Util {
 
diff --git a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/WicketComponentUtils.java b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/WicketComponentUtils.java
index d0d7953..1d06eea 100644
--- a/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/WicketComponentUtils.java
+++ b/core/viewer-wicket-model/src/main/java/org/apache/isis/viewer/wicket/model/models/WicketComponentUtils.java
@@ -16,7 +16,7 @@
  */
 package org.apache.isis.viewer.wicket.model.models;
 
-import org.apache.isis.applib.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Casts;
 import org.apache.wicket.Component;
 import org.apache.wicket.Page;
 import org.apache.wicket.markup.renderStrategy.DeepChildFirstVisitor;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/about/JarManifestModel.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/about/JarManifestModel.java
index c2187d0..88e8bb3 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/about/JarManifestModel.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/about/JarManifestModel.java
@@ -35,7 +35,7 @@ import com.google.common.base.CharMatcher;
 import com.google.common.base.Splitter;
 import com.google.common.collect.Lists;
 
-import org.apache.isis.applib.internal.context._Context;
+import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.commons.lang.CloseableExtensions;
 import org.apache.isis.viewer.wicket.model.models.ModelAbstract;
 
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/collection/bulk/BulkActionsLinkFactory.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/collection/bulk/BulkActionsLinkFactory.java
index f990a83..a78c361 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/collection/bulk/BulkActionsLinkFactory.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/collection/bulk/BulkActionsLinkFactory.java
@@ -23,13 +23,13 @@ import java.util.stream.Collectors;
 
 import org.apache.isis.applib.RecoverableException;
 import org.apache.isis.applib.annotation.InvokedOn;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.collections._Lists;
 import org.apache.isis.applib.services.actinvoc.ActionInvocationContext;
 import org.apache.isis.applib.services.command.Command;
 import org.apache.isis.applib.services.command.Command.Executor;
 import org.apache.isis.applib.services.command.CommandContext;
 import org.apache.isis.applib.services.xactn.TransactionService;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.MessageBroker;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/col/Col.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/col/Col.java
index 68e5b77..3dbb410 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/col/Col.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/col/Col.java
@@ -31,7 +31,6 @@ import com.google.common.collect.Lists;
 
 import org.apache.wicket.Component;
 import org.apache.wicket.markup.html.WebMarkupContainer;
-import org.apache.isis.applib.internal.base._NullSafe;
 import org.apache.isis.applib.layout.component.ActionLayoutData;
 import org.apache.isis.applib.layout.component.CollectionLayoutData;
 import org.apache.isis.applib.layout.component.DomainObjectLayoutData;
@@ -40,6 +39,7 @@ import org.apache.isis.applib.layout.grid.bootstrap3.BS3Col;
 import org.apache.isis.applib.layout.grid.bootstrap3.BS3Row;
 import org.apache.isis.applib.layout.grid.bootstrap3.BS3Tab;
 import org.apache.isis.applib.layout.grid.bootstrap3.BS3TabGroup;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.metamodel.spec.feature.ObjectAction;
 import org.apache.isis.viewer.wicket.model.links.LinkAndLabel;
 import org.apache.isis.viewer.wicket.model.models.EntityModel;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/tabs/TabGroupPanel.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/tabs/TabGroupPanel.java
index 013f188..37c0b52 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/tabs/TabGroupPanel.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/layout/bs3/tabs/TabGroupPanel.java
@@ -21,10 +21,10 @@ package org.apache.isis.viewer.wicket.ui.components.layout.bs3.tabs;
 import java.util.List;
 import java.util.stream.Collectors;
 
-import org.apache.isis.applib.internal.base._NullSafe;
 import org.apache.isis.applib.layout.grid.bootstrap3.BS3Tab;
 import org.apache.isis.applib.layout.grid.bootstrap3.BS3TabGroup;
 import org.apache.isis.applib.services.i18n.TranslationService;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.runtime.system.context.IsisContext;
 import org.apache.isis.viewer.wicket.model.models.EntityModel;
 import org.apache.isis.viewer.wicket.model.util.ComponentHintKey;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/IsisConverterLocator.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/IsisConverterLocator.java
index bba843b..ff13c89 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/IsisConverterLocator.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/IsisConverterLocator.java
@@ -18,9 +18,9 @@
  */
 package org.apache.isis.viewer.wicket.ui.components.scalars;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.base._NullSafe;
-import org.apache.isis.applib.internal.context._Plugin;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+import org.apache.isis.commons.internal.context._Plugin;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.facets.objectvalue.renderedadjusted.RenderedAdjustedFacet;
 import org.apache.isis.core.metamodel.facets.value.bigdecimal.BigDecimalValueFacet;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/reference/ReferencePanel.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/reference/ReferencePanel.java
index 8d82c0f..922e75e 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/reference/ReferencePanel.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/reference/ReferencePanel.java
@@ -21,7 +21,7 @@ package org.apache.isis.viewer.wicket.ui.components.scalars.reference;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager.ConcurrencyChecking;
 import org.apache.isis.core.metamodel.facets.object.autocomplete.AutoCompleteFacet;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/valuechoices/ValueChoicesSelect2Panel.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/valuechoices/ValueChoicesSelect2Panel.java
index 73a2b5c..57d241e 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/valuechoices/ValueChoicesSelect2Panel.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/scalars/valuechoices/ValueChoicesSelect2Panel.java
@@ -18,7 +18,7 @@ package org.apache.isis.viewer.wicket.ui.components.scalars.valuechoices;
 
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.viewer.wicket.model.isis.WicketViewerSettings;
 import org.apache.isis.viewer.wicket.model.mementos.ObjectAdapterMemento;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/tree/IsisToWicketTreeAdapter.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/tree/IsisToWicketTreeAdapter.java
index 7e7f8af..cdbb86b 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/tree/IsisToWicketTreeAdapter.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/tree/IsisToWicketTreeAdapter.java
@@ -12,13 +12,13 @@ import java.util.stream.Stream;
 
 import javax.resource.spi.IllegalStateException;
 
-import org.apache.isis.applib.internal.collections._Lists;
-import org.apache.isis.applib.internal.functions._Functions;
 import org.apache.isis.applib.services.factory.FactoryService;
 import org.apache.isis.applib.tree.TreeAdapter;
 import org.apache.isis.applib.tree.TreeNode;
 import org.apache.isis.applib.tree.TreePath;
 import org.apache.isis.applib.tree.TreeState;
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.functions._Functions;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.oid.RootOid;
 import org.apache.isis.core.runtime.system.context.IsisContext;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/navbar/Placement.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/navbar/Placement.java
index 8a5b977..e8de66f 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/navbar/Placement.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/navbar/Placement.java
@@ -18,7 +18,7 @@
  */
 package org.apache.isis.viewer.wicket.ui.components.widgets.navbar;
 
-import org.apache.isis.applib.internal.resources._Resource;
+import org.apache.isis.commons.internal.resources._Resource;
 
 public enum Placement {
     HEADER,
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceObjectAutoComplete.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceObjectAutoComplete.java
index e85d498..32d7384 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceObjectAutoComplete.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceObjectAutoComplete.java
@@ -39,7 +39,7 @@ package org.apache.isis.viewer.wicket.ui.components.widgets.select2.providers;
 import java.util.Collection;
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.oid.RootOid;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
diff --git a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceParamOrPropertyAutoComplete.java b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceParamOrPropertyAutoComplete.java
index 9307738..f79c454 100644
--- a/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceParamOrPropertyAutoComplete.java
+++ b/core/viewer-wicket-ui/src/main/java/org/apache/isis/viewer/wicket/ui/components/widgets/select2/providers/ObjectAdapterMementoProviderForReferenceParamOrPropertyAutoComplete.java
@@ -39,7 +39,7 @@ package org.apache.isis.viewer.wicket.ui.components.widgets.select2.providers;
 import java.util.Collection;
 import java.util.List;
 
-import org.apache.isis.applib.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.oid.RootOid;
 import org.apache.isis.viewer.wicket.model.isis.WicketViewerSettings;
diff --git a/core/wrapper/src/main/java/org/apache/isis/core/wrapper/handlers/DomainObjectInvocationHandler.java b/core/wrapper/src/main/java/org/apache/isis/core/wrapper/handlers/DomainObjectInvocationHandler.java
index dbea032..a662ccd 100644
--- a/core/wrapper/src/main/java/org/apache/isis/core/wrapper/handlers/DomainObjectInvocationHandler.java
+++ b/core/wrapper/src/main/java/org/apache/isis/core/wrapper/handlers/DomainObjectInvocationHandler.java
@@ -27,7 +27,6 @@ import java.util.Map;
 import java.util.Set;
 
 import org.apache.isis.applib.annotation.Where;
-import org.apache.isis.applib.internal.base._NullSafe;
 import org.apache.isis.applib.services.wrapper.DisabledException;
 import org.apache.isis.applib.services.wrapper.HiddenException;
 import org.apache.isis.applib.services.wrapper.InteractionException;
@@ -41,6 +40,7 @@ import org.apache.isis.applib.services.wrapper.events.PropertyAccessEvent;
 import org.apache.isis.applib.services.wrapper.events.UsabilityEvent;
 import org.apache.isis.applib.services.wrapper.events.ValidityEvent;
 import org.apache.isis.applib.services.wrapper.events.VisibilityEvent;
+import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.metamodel.IsisJdoMetamodelPlugin;
diff --git a/core/wrapper/src/main/java/org/apache/isis/core/wrapper/proxy/ProxyCreator.java b/core/wrapper/src/main/java/org/apache/isis/core/wrapper/proxy/ProxyCreator.java
index 6b2a64d..d408fc8 100644
--- a/core/wrapper/src/main/java/org/apache/isis/core/wrapper/proxy/ProxyCreator.java
+++ b/core/wrapper/src/main/java/org/apache/isis/core/wrapper/proxy/ProxyCreator.java
@@ -23,9 +23,9 @@ import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.Proxy;
 import java.util.Map;
 
-import org.apache.isis.applib.internal.base._Casts;
-import org.apache.isis.applib.internal.collections._Arrays;
 import org.apache.isis.applib.services.wrapper.WrappingObject;
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.collections._Arrays;
 import org.apache.isis.core.commons.lang.ArrayExtensions;
 import org.apache.isis.core.metamodel.specloader.classsubstitutor.ProxyEnhanced;
 import org.apache.isis.core.plugins.codegen.ProxyFactory;

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