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Posted to commits@tinkerpop.apache.org by sp...@apache.org on 2022/01/14 02:00:01 UTC

[tinkerpop] 01/02: wip

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

spmallette pushed a commit to branch TINKERPOP-2681
in repository https://gitbox.apache.org/repos/asf/tinkerpop.git

commit 6b79c8bd19567dbdd371f911dbb5cc285fba88c4
Author: Stephen Mallette <st...@amazon.com>
AuthorDate: Wed Jan 12 10:12:16 2022 -0500

    wip
---
 .../tinkerpop/gremlin/jsr223/CoreImports.java      |   5 +-
 .../language/grammar/GenericLiteralVisitor.java    |  12 +-
 .../language/grammar/GremlinBaseVisitor.java       |  50 +++
 .../language/grammar/TraversalMethodVisitor.java   |  29 ++
 .../grammar/TraversalSourceSpawnMethodVisitor.java |  12 +
 .../tinkerpop/gremlin/process/traversal/Merge.java |  46 +++
 .../{step/TraversalOptionParent.java => Pick.java} |  13 +-
 .../gremlin/process/traversal/Translator.java      |   9 +-
 .../traversal/dsl/graph/GraphTraversal.java        |  75 ++++-
 .../traversal/dsl/graph/GraphTraversalSource.java  |  63 +++-
 .../traversal/step/TraversalOptionParent.java      |  11 +-
 .../process/traversal/step/branch/BranchStep.java  |   3 +-
 .../process/traversal/step/branch/ChooseStep.java  |   9 +-
 .../process/traversal/step/branch/UnionStep.java   |  10 +-
 .../traversal/step/map/MergeVertexStep.java        | 273 ++++++++++++++++
 .../traversal/translator/DotNetTranslator.java     |   5 +-
 .../traversal/translator/GroovyTranslator.java     |   6 +-
 .../traversal/translator/JavascriptTranslator.java |   4 +-
 .../traversal/translator/PythonTranslator.java     |   4 +-
 .../io/binary/TypeSerializerRegistry.java          |   4 +-
 .../structure/io/binary/types/EnumSerializer.java  |   4 +-
 .../structure/io/graphson/GraphSONModule.java      |  14 +-
 .../io/graphson/GraphSONTypeSerializerV2d0.java    |   6 +-
 .../io/graphson/GraphSONTypeSerializerV3d0.java    |   6 +-
 .../gremlin/structure/io/gryo/GryoVersion.java     |   6 +-
 .../traversal/step/branch/BranchStepTest.java      |   2 +-
 .../traversal/step/branch/ChooseStepTest.java      |   2 +-
 .../GraphBinaryReaderWriterRoundTripTest.java      |   4 +-
 .../gremlin-javascript/test/cucumber/gremlin.js    | 344 +--------------------
 gremlin-language/src/main/antlr4/Gremlin.g4        |  32 ++
 gremlin-test/features/map/MergeVertex.feature      | 265 ++++++++++++++++
 .../tinkerpop/gremlin/features/StepDefinition.java |   7 +-
 .../process/ProcessLimitedStandardSuite.java       |  55 ----
 .../process/traversal/step/branch/BranchTest.java  |   4 +-
 .../process/traversal/step/branch/ChooseTest.java  |   6 +-
 .../decoration/EventStrategyProcessTest.java       |  62 ++++
 .../tinkerpop/gremlin/structure/io/Model.java      |   4 +-
 .../_3_2_3/manual-graphson-generator.groovy        |   5 +-
 .../_3_2_4/manual-graphson-generator.groovy        |   5 +-
 .../io/gryo/_3_2_3/manual-gryo-generator.groovy    |   8 +-
 .../io/gryo/_3_2_4/manual-gryo-generator.groovy    |   8 +-
 41 files changed, 993 insertions(+), 499 deletions(-)

diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/jsr223/CoreImports.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/jsr223/CoreImports.java
index 194a192..a34f0d7 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/jsr223/CoreImports.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/jsr223/CoreImports.java
@@ -58,6 +58,7 @@ import org.apache.tinkerpop.gremlin.process.traversal.IO;
 import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
@@ -200,7 +201,7 @@ public final class CoreImports {
         CLASS_IMPORTS.add(Scope.class);
         CLASS_IMPORTS.add(T.class);
         CLASS_IMPORTS.add(TraversalOptionParent.class);
-        CLASS_IMPORTS.add(TraversalOptionParent.Pick.class);
+        CLASS_IMPORTS.add(Pick.class);
         CLASS_IMPORTS.add(P.class);
         CLASS_IMPORTS.add(TextP.class);
         CLASS_IMPORTS.add(WithOptions.class);
@@ -349,7 +350,7 @@ public final class CoreImports {
         Collections.addAll(ENUM_IMPORTS, Pop.values());
         Collections.addAll(ENUM_IMPORTS, Scope.values());
         Collections.addAll(ENUM_IMPORTS, T.values());
-        Collections.addAll(ENUM_IMPORTS, TraversalOptionParent.Pick.values());
+        Collections.addAll(ENUM_IMPORTS, Pick.values());
     }
 
     private CoreImports() {
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GenericLiteralVisitor.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GenericLiteralVisitor.java
index f71bcf7..151174a 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GenericLiteralVisitor.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GenericLiteralVisitor.java
@@ -20,9 +20,9 @@ package org.apache.tinkerpop.gremlin.language.grammar;
 
 import org.antlr.v4.runtime.tree.ParseTree;
 import org.apache.commons.text.StringEscapeUtils;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.structure.Direction;
 import org.apache.tinkerpop.gremlin.structure.T;
 import org.apache.tinkerpop.gremlin.structure.VertexProperty;
@@ -33,6 +33,7 @@ import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 
 /**
@@ -81,6 +82,13 @@ public class GenericLiteralVisitor extends GremlinBaseVisitor<Object> {
     }
 
     /**
+     * Parse a map literal context and return the map literal
+     */
+    public static Map getMapLiteral(final GremlinParser.GenericLiteralMapContext mapLiteral) {
+        return (Map) (instance().visitGenericLiteralMap(mapLiteral));
+    }
+
+    /**
      * Parse a boolean literal context and return the boolean literal
      */
     public static boolean getBooleanLiteral(final GremlinParser.BooleanLiteralContext booleanLiteral) {
@@ -464,7 +472,7 @@ public class GenericLiteralVisitor extends GremlinBaseVisitor<Object> {
      */
     @Override
     public Object visitTraversalOptionParent(final GremlinParser.TraversalOptionParentContext ctx) {
-        return TraversalEnumParser.parseTraversalEnumFromContext(TraversalOptionParent.Pick.class, ctx);
+        return TraversalEnumParser.parseTraversalEnumFromContext(Pick.class, ctx);
     }
 
     @Override
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GremlinBaseVisitor.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GremlinBaseVisitor.java
index fd48b79..0a93e4e 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GremlinBaseVisitor.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/GremlinBaseVisitor.java
@@ -1521,4 +1521,54 @@ public class GremlinBaseVisitor<T> extends AbstractParseTreeVisitor<T> implement
 	public T visitStructureVertex(final GremlinParser.StructureVertexContext ctx) {
 		notImplemented(ctx); return null;
 	}
+
+	@Override
+	public T visitTraversalSourceSpawnMethod_mergeV_Map(final GremlinParser.TraversalSourceSpawnMethod_mergeV_MapContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalSourceSpawnMethod_mergeV_Traversal(final GremlinParser.TraversalSourceSpawnMethod_mergeV_TraversalContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalSourceSpawnMethod_mergeE(final GremlinParser.TraversalSourceSpawnMethod_mergeEContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalMethod_option_Merge_Map(GremlinParser.TraversalMethod_option_Merge_MapContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalMethod_option_Merge_Traversal(final GremlinParser.TraversalMethod_option_Merge_TraversalContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalMerge(final GremlinParser.TraversalMergeContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalMethod_mergeV_Map(final GremlinParser.TraversalMethod_mergeV_MapContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalMethod_mergeV_Traversal(final GremlinParser.TraversalMethod_mergeV_TraversalContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalMethod_mergeE_Map(final GremlinParser.TraversalMethod_mergeE_MapContext ctx) {
+		notImplemented(ctx); return null;
+	}
+
+	@Override
+	public T visitTraversalMethod_mergeE_Traversal(final GremlinParser.TraversalMethod_mergeE_TraversalContext ctx) {
+		notImplemented(ctx); return null;
+	}
 }
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalMethodVisitor.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalMethodVisitor.java
index fac55d6..be0fff5 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalMethodVisitor.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalMethodVisitor.java
@@ -18,6 +18,7 @@
  */
 package org.apache.tinkerpop.gremlin.language.grammar;
 
+import org.apache.tinkerpop.gremlin.process.traversal.Merge;
 import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
@@ -86,6 +87,16 @@ public class TraversalMethodVisitor extends TraversalRootVisitor<GraphTraversal>
     }
 
     @Override
+    public GraphTraversal visitTraversalMethod_mergeV_Map(final GremlinParser.TraversalMethod_mergeV_MapContext ctx) {
+        return this.graphTraversal.mergeV(GenericLiteralVisitor.getMapLiteral(ctx.genericLiteralMap()));
+    }
+
+    @Override
+    public GraphTraversal visitTraversalMethod_mergeV_Traversal(final GremlinParser.TraversalMethod_mergeV_TraversalContext ctx) {
+        return this.graphTraversal.mergeV(antlr.tvisitor.visitNestedTraversal(ctx.nestedTraversal()));
+    }
+
+    @Override
     public GraphTraversal visitTraversalMethod_addE_Traversal(final GremlinParser.TraversalMethod_addE_TraversalContext ctx) {
         return this.graphTraversal.addE(antlr.tvisitor.visitNestedTraversal(ctx.nestedTraversal()));
     }
@@ -973,6 +984,24 @@ public class TraversalMethodVisitor extends TraversalRootVisitor<GraphTraversal>
      * {@inheritDoc}
      */
     @Override
+    public GraphTraversal visitTraversalMethod_option_Merge_Map(final GremlinParser.TraversalMethod_option_Merge_MapContext ctx) {
+        return graphTraversal.option(TraversalEnumParser.parseTraversalEnumFromContext(Merge.class, ctx.traversalMerge()),
+                (Map) new GenericLiteralVisitor(antlr).visitGenericLiteralMap(ctx.genericLiteralMap()));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public GraphTraversal visitTraversalMethod_option_Merge_Traversal(final GremlinParser.TraversalMethod_option_Merge_TraversalContext ctx) {
+        return this.graphTraversal.option(TraversalEnumParser.parseTraversalEnumFromContext(Merge.class, ctx.traversalMerge()),
+                antlr.tvisitor.visitNestedTraversal(ctx.nestedTraversal()));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
     public GraphTraversal visitTraversalMethod_optional(final GremlinParser.TraversalMethod_optionalContext ctx) {
         return this.graphTraversal.optional(antlr.tvisitor.visitNestedTraversal(ctx.nestedTraversal()));
     }
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalSourceSpawnMethodVisitor.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalSourceSpawnMethodVisitor.java
index 73e8612..664afac 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalSourceSpawnMethodVisitor.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/language/grammar/TraversalSourceSpawnMethodVisitor.java
@@ -22,6 +22,8 @@ import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
 
+import java.util.Map;
+
 /**
  * Use a {@link GraphTraversalSource} as the source and returns a {@link GraphTraversal} object.
  */
@@ -114,4 +116,14 @@ public class TraversalSourceSpawnMethodVisitor extends GremlinBaseVisitor<GraphT
         }
         return graphTraversal;
     }
+
+    @Override
+    public GraphTraversal visitTraversalSourceSpawnMethod_mergeV_Map(final GremlinParser.TraversalSourceSpawnMethod_mergeV_MapContext ctx) {
+        return this.traversalSource.mergeV(GenericLiteralVisitor.getMapLiteral(ctx.genericLiteralMap()));
+    }
+
+    @Override
+    public GraphTraversal visitTraversalSourceSpawnMethod_mergeV_Traversal(final GremlinParser.TraversalSourceSpawnMethod_mergeV_TraversalContext ctx) {
+        return this.traversalSource.mergeV(anonymousVisitor.visitNestedTraversal(ctx.nestedTraversal()));
+    }
 }
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Merge.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Merge.java
new file mode 100644
index 0000000..a64d8ce
--- /dev/null
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Merge.java
@@ -0,0 +1,46 @@
+/*
+ * 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.
+ */
+package org.apache.tinkerpop.gremlin.process.traversal;
+
+import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
+import org.apache.tinkerpop.gremlin.structure.Element;
+
+import java.util.Map;
+
+/**
+ * Options relevant to upsert-like steps such as {@link GraphTraversalSource#mergeV(Map)}.
+ */
+public enum Merge {
+
+    /**
+     * Allows definition of the action to take when a merge operation ends up not matching the search criteria.
+     * Typically, this event means that an {@link Element} will be created.
+     *
+     * @since 3.6.0
+     */
+    onCreate,
+
+    /**
+     * Allows definition of the action to take when a merge operation ends up successfully matching the search criteria.
+     * Typically, this event means that the matched {@link Element} will be returned.
+     *
+     * @since 3.6.0
+     */
+    onMatch
+}
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/TraversalOptionParent.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Pick.java
similarity index 66%
copy from gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/TraversalOptionParent.java
copy to gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Pick.java
index 6eb60a2..980c7dd 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/TraversalOptionParent.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Pick.java
@@ -16,16 +16,11 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.apache.tinkerpop.gremlin.process.traversal.step;
-
-import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
+package org.apache.tinkerpop.gremlin.process.traversal;
 
 /**
- * @author Marko A. Rodriguez (http://markorodriguez.com)
+ * A token used with {@code option()}.
  */
-public interface TraversalOptionParent<M, S, E> extends TraversalParent {
-
-    public static enum Pick {any, none}
-
-    public void addGlobalChildOption(final M pickToken, final Traversal.Admin<S, E> traversalOption);
+public enum Pick {
+    any, none
 }
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Translator.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Translator.java
index 30dccc4..0be7555 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Translator.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Translator.java
@@ -19,7 +19,6 @@
 
 package org.apache.tinkerpop.gremlin.process.traversal;
 
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.TraversalStrategyProxy;
 import org.apache.tinkerpop.gremlin.structure.Edge;
 import org.apache.tinkerpop.gremlin.structure.Vertex;
@@ -165,9 +164,9 @@ public interface Translator<S, T> {
             protected abstract String getSyntax(final VertexProperty.Cardinality o);
 
             /**
-             * Take the {@link TraversalOptionParent.Pick} argument and convert it to a string representation in the target language.
+             * Take the {@link Pick} argument and convert it to a string representation in the target language.
              */
-            protected abstract String getSyntax(final TraversalOptionParent.Pick o);
+            protected abstract String getSyntax(final Pick o);
 
             /**
              * Take the numeric argument and convert it to a string representation in the target language. Languages
@@ -308,8 +307,8 @@ public interface Translator<S, T> {
                     return script.append(getSyntax((SackFunctions.Barrier) object));
                 } else if (object instanceof VertexProperty.Cardinality) {
                     return script.append(getSyntax((VertexProperty.Cardinality) object));
-                } else if (object instanceof TraversalOptionParent.Pick) {
-                    return script.append(getSyntax((TraversalOptionParent.Pick) object));
+                } else if (object instanceof Pick) {
+                    return script.append(getSyntax((Pick) object));
                 } else if (object instanceof Enum) {
                     return produceScript((Enum<?>) object);
                 } else if (object instanceof Vertex) {
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversal.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversal.java
index 95927d6..721c1f7 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversal.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversal.java
@@ -26,15 +26,18 @@ import org.apache.tinkerpop.gremlin.process.computer.traversal.step.map.PeerPres
 import org.apache.tinkerpop.gremlin.process.computer.traversal.step.map.ProgramVertexProgramStep;
 import org.apache.tinkerpop.gremlin.process.computer.traversal.step.map.ShortestPathVertexProgramStep;
 import org.apache.tinkerpop.gremlin.process.traversal.Failure;
+import org.apache.tinkerpop.gremlin.process.traversal.Merge;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
 import org.apache.tinkerpop.gremlin.process.traversal.Path;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.Step;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
 import org.apache.tinkerpop.gremlin.process.traversal.lambda.ColumnTraversal;
+import org.apache.tinkerpop.gremlin.process.traversal.lambda.ConstantTraversal;
 import org.apache.tinkerpop.gremlin.process.traversal.lambda.FunctionTraverser;
 import org.apache.tinkerpop.gremlin.process.traversal.lambda.LoopTraversal;
 import org.apache.tinkerpop.gremlin.process.traversal.lambda.PredicateTraverser;
@@ -100,6 +103,7 @@ import org.apache.tinkerpop.gremlin.process.traversal.step.map.MaxGlobalStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.MaxLocalStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.MeanGlobalStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.MeanLocalStep;
+import org.apache.tinkerpop.gremlin.process.traversal.step.map.MergeVertexStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.MinGlobalStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.MinLocalStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.NoOpBarrierStep;
@@ -1071,6 +1075,37 @@ public interface GraphTraversal<S, E> extends Traversal<S, E> {
     }
 
     /**
+     * Performs a merge (i.e. upsert) style operation for an {@link Vertex} using a {@code Map} as an argument.
+     * The {@code Map} represents search criteria and will match each of the supplied key/value pairs where the keys
+     * may be {@code String} property values or a value of {@link T}. If a match is not made it will use that search
+     * criteria to create the new {@link Vertex}.
+     *
+     * @param searchCreate This {@code Map} can have a key of {@link T} or a {@code String}.
+     * @since 3.6.0
+     */
+    public default GraphTraversal<S, Vertex> mergeV(final Map<Object, Object> searchCreate) {
+        this.asAdmin().getBytecode().addStep(Symbols.mergeV, searchCreate);
+        final MergeVertexStep<S> step = new MergeVertexStep<>(this.asAdmin(), false, searchCreate);
+        return this.asAdmin().addStep(step);
+    }
+
+    /**
+     * Performs a merge (i.e. upsert) style operation for an {@link Vertex} using a {@code Map} as an argument.
+     * The {@code Map} represents search criteria and will match each of the supplied key/value pairs where the keys
+     * may be {@code String} property values or a value of {@link T}. If a match is not made it will use that search
+     * criteria to create the new {@link Vertex}.
+     *
+     *  @param searchCreate This anonymous {@link Traversal} must produce a {@code Map} that may have a keys of
+     *  {@link T} or a {@code String}.
+     *  @since 3.6.0
+     */
+    public default GraphTraversal<S, Vertex> mergeV(final Traversal<S, Map<Object, Object>> searchCreate) {
+        this.asAdmin().getBytecode().addStep(Symbols.mergeV, searchCreate);
+        final MergeVertexStep<S> step = new MergeVertexStep<>(this.asAdmin(), false, searchCreate.asAdmin());
+        return this.asAdmin().addStep(step);
+    }
+
+    /**
      * Adds an {@link Edge} with the specified edge label.
      *
      * @param edgeLabel the label of the newly added edge
@@ -3024,7 +3059,7 @@ public interface GraphTraversal<S, E> extends Traversal<S, E> {
     /**
      * This step modifies {@link #choose(Function)} to specifies the available choices that might be executed.
      *
-     * @param pick       the token that would trigger this option which may be a {@link TraversalOptionParent.Pick},
+     * @param pick       the token that would trigger this option which may be a {@link Pick},
      *                   a {@link Traversal}, {@link Predicate}, or object depending on the step being modulated.
      * @param traversalOption the option as a traversal
      * @return the traversal with the modulated step
@@ -3033,7 +3068,7 @@ public interface GraphTraversal<S, E> extends Traversal<S, E> {
      */
     public default <M, E2> GraphTraversal<S, E> option(final M pick, final Traversal<?, E2> traversalOption) {
         this.asAdmin().getBytecode().addStep(Symbols.option, pick, traversalOption);
-        ((TraversalOptionParent<M, E, E2>) this.asAdmin().getEndStep()).addGlobalChildOption(pick, (Traversal.Admin<E, E2>) traversalOption.asAdmin());
+        ((TraversalOptionParent<M, E, E2>) this.asAdmin().getEndStep()).addChildOption(pick, (Traversal.Admin<E, E2>) traversalOption.asAdmin());
         return this;
     }
 
@@ -3047,7 +3082,39 @@ public interface GraphTraversal<S, E> extends Traversal<S, E> {
      */
     public default <E2> GraphTraversal<S, E> option(final Traversal<?, E2> traversalOption) {
         this.asAdmin().getBytecode().addStep(Symbols.option, traversalOption);
-        ((TraversalOptionParent<Object, E, E2>) this.asAdmin().getEndStep()).addGlobalChildOption(TraversalOptionParent.Pick.any, (Traversal.Admin<E, E2>) traversalOption.asAdmin());
+        ((TraversalOptionParent<Object, E, E2>) this.asAdmin().getEndStep()).addChildOption(Pick.any, (Traversal.Admin<E, E2>) traversalOption.asAdmin());
+        return this;
+    }
+
+    /**
+     * This step modifies merge related steps to specify the available choices that might be executed on the available
+     * {@link Merge} options.
+     *
+     * @param traversal the option as a traversal
+     * @return the traversal with the modulated step
+     * @see <a href="http://tinkerpop.apache.org/docs/${project.version}/reference/#mergev-step" target="_blank">Reference Documentation - MergeV Step</a>
+     * @see <a href="http://tinkerpop.apache.org/docs/${project.version}/reference/#mergee-step" target="_blank">Reference Documentation - MergeE Step</a>
+     * @since 3.6.0
+     */
+    public default <E2> GraphTraversal<S, E> option(final Merge merge, final Traversal<?, E2> traversal) {
+        this.asAdmin().getBytecode().addStep(Symbols.option, merge, traversal);
+        ((TraversalOptionParent<Merge, E, E2>) this.asAdmin().getEndStep()).addChildOption(merge, (Traversal.Admin<E, E2>) traversal.asAdmin());
+        return this;
+    }
+
+    /**
+     * This step modifies merge related steps to specify the available choices that might be executed on the available
+     * {@link Merge} options.
+     *
+     * @param m
+     * @return the traversal with the modulated step
+     * @see <a href="http://tinkerpop.apache.org/docs/${project.version}/reference/#mergev-step" target="_blank">Reference Documentation - MergeV Step</a>
+     * @see <a href="http://tinkerpop.apache.org/docs/${project.version}/reference/#mergee-step" target="_blank">Reference Documentation - MergeE Step</a>
+     * @since 3.6.0
+     */
+    public default <E2> GraphTraversal<S, E> option(final Merge merge, final Map<Object, Object> m) {
+        this.asAdmin().getBytecode().addStep(Symbols.option, merge, m);
+        ((TraversalOptionParent<Merge, E, E2>) this.asAdmin().getEndStep()).addChildOption(merge, (Traversal.Admin<E, E2>) new ConstantTraversal<>(m).asAdmin());
         return this;
     }
 
@@ -3150,6 +3217,8 @@ public interface GraphTraversal<S, E> extends Traversal<S, E> {
         public static final String tree = "tree";
         public static final String addV = "addV";
         public static final String addE = "addE";
+        public static final String mergeV = "mergeV";
+        public static final String mergeE = "mergeE";
         public static final String from = "from";
         public static final String filter = "filter";
         public static final String or = "or";
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversalSource.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversalSource.java
index fbb873f..6726255 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversalSource.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversalSource.java
@@ -30,17 +30,20 @@ import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.AddEdgeStartStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.AddVertexStartStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.GraphStep;
+import org.apache.tinkerpop.gremlin.process.traversal.step.map.MergeVertexStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.IoStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.InjectStep;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.RequirementsStrategy;
 import org.apache.tinkerpop.gremlin.process.traversal.traverser.TraverserRequirement;
 import org.apache.tinkerpop.gremlin.structure.Edge;
 import org.apache.tinkerpop.gremlin.structure.Graph;
+import org.apache.tinkerpop.gremlin.structure.T;
 import org.apache.tinkerpop.gremlin.structure.Transaction;
 import org.apache.tinkerpop.gremlin.structure.Vertex;
 import org.apache.tinkerpop.gremlin.structure.util.StringFactory;
 import org.apache.tinkerpop.gremlin.structure.util.empty.EmptyGraph;
 
+import java.util.Map;
 import java.util.Optional;
 import java.util.function.BinaryOperator;
 import java.util.function.Supplier;
@@ -298,6 +301,8 @@ public class GraphTraversalSource implements TraversalSource {
     /**
      * Spawns a {@link GraphTraversal} by adding a vertex with the specified label. If the {@code label} is
      * {@code null} then it will default to {@link Vertex#DEFAULT_LABEL}.
+     *
+     * @since 3.1.0-incubating
      */
     public GraphTraversal<Vertex, Vertex> addV(final String vertexLabel) {
         if (null == vertexLabel) throw new IllegalArgumentException("vertexLabel cannot be null");
@@ -310,6 +315,8 @@ public class GraphTraversalSource implements TraversalSource {
     /**
      * Spawns a {@link GraphTraversal} by adding a vertex with the label as determined by a {@link Traversal}. If the
      * {@code vertexLabelTraversal} is {@code null} then it will default to {@link Vertex#DEFAULT_LABEL}.
+     *
+     * @since 3.3.1
      */
     public GraphTraversal<Vertex, Vertex> addV(final Traversal<?, String> vertexLabelTraversal) {
         if (null == vertexLabelTraversal) throw new IllegalArgumentException("vertexLabelTraversal cannot be null");
@@ -321,6 +328,8 @@ public class GraphTraversalSource implements TraversalSource {
 
     /**
      * Spawns a {@link GraphTraversal} by adding a vertex with the default label.
+     *
+     * @since 3.1.0-incubating
      */
     public GraphTraversal<Vertex, Vertex> addV() {
         final GraphTraversalSource clone = this.clone();
@@ -330,7 +339,9 @@ public class GraphTraversalSource implements TraversalSource {
     }
 
     /**
-     * Spawns a {@link GraphTraversal} by adding a edge with the specified label.
+     * Spawns a {@link GraphTraversal} by adding an edge with the specified label.
+     *
+     * @since 3.1.0-incubating
      */
     public GraphTraversal<Edge, Edge> addE(final String label) {
         final GraphTraversalSource clone = this.clone();
@@ -341,6 +352,8 @@ public class GraphTraversalSource implements TraversalSource {
 
     /**
      * Spawns a {@link GraphTraversal} by adding a edge with a label as specified by the provided {@link Traversal}.
+     *
+     * @since 3.3.1
      */
     public GraphTraversal<Edge, Edge> addE(final Traversal<?, String> edgeLabelTraversal) {
         final GraphTraversalSource clone = this.clone();
@@ -350,6 +363,50 @@ public class GraphTraversalSource implements TraversalSource {
     }
 
     /**
+     * Spawns a {@link GraphTraversal} by doing a merge (i.e. upsert) style operation for an {@link Vertex} using a
+     * {@code Map} as an argument. The {@code Map} represents search criteria and will match each of the supplied
+     * key/value pairs where the keys may be {@code String} property values or a value of {@link T}. If a match is not
+     * made it will use that search criteria to create the new {@link Vertex}.
+     *
+     * @param searchCreate This {@code Map} can have a key of {@link T} or a {@code String}.
+     * @since 3.6.0
+     */
+    public GraphTraversal<Vertex, Vertex> mergeV(final Map<Object, Object> searchCreate) {
+        final GraphTraversalSource clone = this.clone();
+        clone.bytecode.addStep(GraphTraversal.Symbols.mergeV, searchCreate);
+        final GraphTraversal.Admin<Vertex, Vertex> traversal = new DefaultGraphTraversal<>(clone);
+        return traversal.addStep(new MergeVertexStep(traversal, true, searchCreate));
+    }
+
+    /**
+     * Spawns a {@link GraphTraversal} by doing a merge (i.e. upsert) style operation for an {@link Vertex} using a
+     * {@code Map} as an argument. The {@code Map} represents search criteria and will match each of the supplied
+     * key/value pairs where the keys may be {@code String} property values or a value of {@link T}. If a match is not
+     * made it will use that search criteria to create the new {@link Vertex}.
+     *
+     * @param searchCreate This anonymous {@link Traversal} must produce a {@code Map} that may have a keys of
+     * {@link T} or a {@code String}.
+     * @since 3.6.0
+     */
+    public <S> GraphTraversal<S, Vertex> mergeV(final Traversal<S, Map<Object, Object>> searchCreate) {
+        final GraphTraversalSource clone = this.clone();
+        clone.bytecode.addStep(GraphTraversal.Symbols.mergeV, searchCreate);
+        final GraphTraversal.Admin<S, Vertex> traversal = new DefaultGraphTraversal<>(clone);
+        return traversal.addStep(new MergeVertexStep(traversal, true, searchCreate.asAdmin()));
+    }
+
+    /**
+     * Spawns a {@link GraphTraversal} by doing a merge (i.e. upsert) style operation for an {@link Edge} using a
+     * {@code Map} as an argument.
+     */
+//    public GraphTraversal<Edge, Edge> mergeE(final Map<?, Object> searchCreate) {
+//        final GraphTraversalSource clone = this.clone();
+//        clone.bytecode.addStep(GraphTraversal.Symbols.mergeE, searchCreate);
+//        final GraphTraversal.Admin<Edge, Edge> traversal = new DefaultGraphTraversal<>(clone);
+//        return traversal.addStep(new MergeVertexStartStep(traversal, searchCreate));
+//    }
+
+    /**
      * Spawns a {@link GraphTraversal} starting it with arbitrary values.
      */
     public <S> GraphTraversal<S, S> inject(S... starts) {
@@ -364,6 +421,8 @@ public class GraphTraversalSource implements TraversalSource {
     /**
      * Spawns a {@link GraphTraversal} starting with all vertices or some subset of vertices as specified by their
      * unique identifier.
+     *
+     * @since 3.0.0-incubating
      */
     public GraphTraversal<Vertex, Vertex> V(final Object... vertexIds) {
         // a single null is [null]
@@ -377,6 +436,8 @@ public class GraphTraversalSource implements TraversalSource {
     /**
      * Spawns a {@link GraphTraversal} starting with all edges or some subset of edges as specified by their unique
      * identifier.
+     *
+     * @since 3.0.0-incubating
      */
     public GraphTraversal<Edge, Edge> E(final Object... edgeIds) {
         // a single null is [null]
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/TraversalOptionParent.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/TraversalOptionParent.java
index 6eb60a2..ef9b92c 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/TraversalOptionParent.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/TraversalOptionParent.java
@@ -18,14 +18,19 @@
  */
 package org.apache.tinkerpop.gremlin.process.traversal.step;
 
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 
 /**
+ * Describes steps that can be parent to a {@link Traversal} from {@code option()}.
+ *
  * @author Marko A. Rodriguez (http://markorodriguez.com)
  */
 public interface TraversalOptionParent<M, S, E> extends TraversalParent {
 
-    public static enum Pick {any, none}
-
-    public void addGlobalChildOption(final M pickToken, final Traversal.Admin<S, E> traversalOption);
+    /**
+     * The child as defined by the token it takes, like {@link Pick}. This traversal may be of local or global scope
+     * depending on the step implementation that works with {@code option()}.
+     */
+    public void addChildOption(final M token, final Traversal.Admin<S, E> traversalOption);
 }
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStep.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStep.java
index 361ed54..085cf57 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStep.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStep.java
@@ -18,6 +18,7 @@
  */
 package org.apache.tinkerpop.gremlin.process.traversal.step.branch;
 
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
 import org.apache.tinkerpop.gremlin.process.traversal.lambda.PredicateTraversal;
@@ -63,7 +64,7 @@ public class BranchStep<S, E, M> extends ComputerAwareStep<S, E> implements Trav
     }
 
     @Override
-    public void addGlobalChildOption(final M pickToken, final Traversal.Admin<S, E> traversalOption) {
+    public void addChildOption(final M pickToken, final Traversal.Admin<S, E> traversalOption) {
         if (pickToken instanceof Pick) {
             if (this.traversalPickOptions.containsKey(pickToken))
                 this.traversalPickOptions.get(pickToken).add(traversalOption);
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStep.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStep.java
index a804d8f..86ec39e 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStep.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStep.java
@@ -18,6 +18,7 @@
  */
 package org.apache.tinkerpop.gremlin.process.traversal.step.branch;
 
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.HasNextStep;
 
@@ -36,18 +37,18 @@ public final class ChooseStep<S, E, M> extends BranchStep<S, E, M> {
 
     public ChooseStep(final Traversal.Admin traversal, final Traversal.Admin<S, ?> predicateTraversal, final Traversal.Admin<S, E> trueChoice, final Traversal.Admin<S, E> falseChoice) {
         this(traversal, (Traversal.Admin<S, M>) predicateTraversal.addStep(new HasNextStep<>(predicateTraversal)));
-        this.addGlobalChildOption((M) Boolean.TRUE, trueChoice);
-        this.addGlobalChildOption((M) Boolean.FALSE, falseChoice);
+        this.addChildOption((M) Boolean.TRUE, trueChoice);
+        this.addChildOption((M) Boolean.FALSE, falseChoice);
     }
 
     @Override
-    public void addGlobalChildOption(final M pickToken, final Traversal.Admin<S, E> traversalOption) {
+    public void addChildOption(final M pickToken, final Traversal.Admin<S, E> traversalOption) {
         if (pickToken instanceof Pick) {
             if (Pick.any.equals(pickToken))
                 throw new IllegalArgumentException("Choose step can not have an any-option as only one option per traverser is allowed");
             if (this.traversalPickOptions.containsKey(pickToken))
                 throw new IllegalArgumentException("Choose step can only have one traversal per pick token: " + pickToken);
         }
-        super.addGlobalChildOption(pickToken, traversalOption);
+        super.addChildOption(pickToken, traversalOption);
     }
 }
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/UnionStep.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/UnionStep.java
index de70479..1ce6137 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/UnionStep.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/UnionStep.java
@@ -18,8 +18,8 @@
  */
 package org.apache.tinkerpop.gremlin.process.traversal.step.branch;
 
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.lambda.ConstantTraversal;
 import org.apache.tinkerpop.gremlin.structure.util.StringFactory;
 
@@ -28,21 +28,21 @@ import java.util.Collections;
 /**
  * @author Marko A. Rodriguez (http://markorodriguez.com)
  */
-public final class UnionStep<S, E> extends BranchStep<S, E, TraversalOptionParent.Pick> {
+public final class UnionStep<S, E> extends BranchStep<S, E, Pick> {
 
     public UnionStep(final Traversal.Admin traversal, final Traversal.Admin<?, E>... unionTraversals) {
         super(traversal);
         this.setBranchTraversal(new ConstantTraversal<>(Pick.any));
         for (final Traversal.Admin<?, E> union : unionTraversals) {
-            this.addGlobalChildOption(Pick.any, (Traversal.Admin) union);
+            this.addChildOption(Pick.any, (Traversal.Admin) union);
         }
     }
 
     @Override
-    public void addGlobalChildOption(final Pick pickToken, final Traversal.Admin<S, E> traversalOption) {
+    public void addChildOption(final Pick pickToken, final Traversal.Admin<S, E> traversalOption) {
         if (Pick.any != pickToken)
             throw new IllegalArgumentException("Union step only supports the any token: " + pickToken);
-        super.addGlobalChildOption(pickToken, traversalOption);
+        super.addChildOption(pickToken, traversalOption);
     }
 
     @Override
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeVertexStep.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeVertexStep.java
new file mode 100644
index 0000000..ce77200
--- /dev/null
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeVertexStep.java
@@ -0,0 +1,273 @@
+/*
+ * 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.
+ */
+package org.apache.tinkerpop.gremlin.process.traversal.step.map;
+
+import org.apache.tinkerpop.gremlin.process.traversal.Merge;
+import org.apache.tinkerpop.gremlin.process.traversal.Step;
+import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
+import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
+import org.apache.tinkerpop.gremlin.process.traversal.TraverserGenerator;
+import org.apache.tinkerpop.gremlin.process.traversal.lambda.ConstantTraversal;
+import org.apache.tinkerpop.gremlin.process.traversal.step.Mutating;
+import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
+import org.apache.tinkerpop.gremlin.process.traversal.step.util.Parameters;
+import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.CallbackRegistry;
+import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.Event;
+import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.ListCallbackRegistry;
+import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.EventStrategy;
+import org.apache.tinkerpop.gremlin.process.traversal.traverser.TraverserRequirement;
+import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalUtil;
+import org.apache.tinkerpop.gremlin.structure.Graph;
+import org.apache.tinkerpop.gremlin.structure.Property;
+import org.apache.tinkerpop.gremlin.structure.T;
+import org.apache.tinkerpop.gremlin.structure.Vertex;
+import org.apache.tinkerpop.gremlin.structure.VertexProperty;
+import org.apache.tinkerpop.gremlin.structure.util.StringFactory;
+import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Stream;
+
+/**
+ * Implementation for the {@code mergeV()} step covering both the start step version and the one used mid-traversal.
+ */
+public class MergeVertexStep<S> extends FlatMapStep<S, Vertex> implements Mutating<Event>,
+        TraversalOptionParent<Merge, S, Vertex> {
+
+    private final boolean isStart;
+    private boolean first = true;
+    private Traversal.Admin<S,Map<Object, Object>> searchCreateTraversal;
+    private Traversal.Admin<S, Map<Object, Object>> onCreateTraversal = null;
+    private Traversal.Admin<S, Map<String, Object>> onMatchTraversal = null;
+
+    private CallbackRegistry<Event> callbackRegistry;
+
+    public MergeVertexStep(final Traversal.Admin traversal, final boolean isStart, final Map<Object, Object> searchCreate) {
+        this(traversal, isStart, new ConstantTraversal<>(searchCreate));
+    }
+
+    public MergeVertexStep(final Traversal.Admin traversal, final boolean isStart, final Traversal.Admin<S,Map<Object, Object>> searchCreateTraversal) {
+        super(traversal);
+        this.isStart = isStart;
+        this.searchCreateTraversal = integrateChild(searchCreateTraversal);
+    }
+
+    public Traversal.Admin<S, Map<Object, Object>> getSearchCreateTraversal() {
+        return searchCreateTraversal;
+    }
+
+    public Traversal.Admin<S, Map<Object, Object>> getOnCreateTraversal() {
+        return onCreateTraversal;
+    }
+
+    public Traversal.Admin<S, Map<String, Object>> getOnMatchTraversal() {
+        return onMatchTraversal;
+    }
+
+    /**
+     * Determines if this is a start step.
+     */
+    public boolean isStart() {
+        return isStart;
+    }
+
+    public boolean isFirst() {
+        return first;
+    }
+
+    public CallbackRegistry<Event> getCallbackRegistry() {
+        return callbackRegistry;
+    }
+
+    @Override
+    public void addChildOption(final Merge token, final Traversal.Admin<S, Vertex> traversalOption) {
+        if (token == Merge.onCreate) {
+            this.onCreateTraversal = this.integrateChild(traversalOption);
+        } else if (token == Merge.onMatch) {
+            this.onMatchTraversal = this.integrateChild(traversalOption);
+        } else {
+            throw new UnsupportedOperationException(String.format("Option %s for Merge is not supported", token.name()));
+        }
+    }
+
+    @Override
+    public <S, E> List<Traversal.Admin<S, E>> getLocalChildren() {
+        final List<Traversal.Admin<S, E>> children = new ArrayList<>();
+        if (searchCreateTraversal != null) children.add((Traversal.Admin<S, E>) searchCreateTraversal);
+        if (onMatchTraversal != null) children.add((Traversal.Admin<S, E>) onMatchTraversal);
+        if (onCreateTraversal != null) children.add((Traversal.Admin<S, E>) onCreateTraversal);
+        return children;
+    }
+
+    @Override
+    public void configure(final Object... keyValues) {
+        // this is a Mutating step but property() should not be folded into this step. this exception should not
+        // end up visible to users really
+    }
+
+    @Override
+    public Parameters getParameters() {
+        // merge doesn't take foldups of property() calls. those need to get treated as regular old PropertyStep
+        // instances. not sure if this should support with() though.....none of the other Mutating steps do.
+        return null;
+    }
+
+    @Override
+    protected Traverser.Admin<Vertex> processNextStart() {
+        // when it's a start step a traverser needs to be created to kick off the traversal.
+        if (isStart && first) {
+            first = false;
+            final TraverserGenerator generator = this.getTraversal().getTraverserGenerator();
+            this.addStart(generator.generate(false, (Step) this, 1L));
+        }
+        return super.processNextStart();
+    }
+
+    @Override
+    protected Iterator<Vertex> flatMap(final Traverser.Admin<S> traverser) {
+        final Map<Object,Object> searchCreate = TraversalUtil.apply(traverser, searchCreateTraversal);
+
+        final Graph graph = this.getTraversal().getGraph().get();
+        Stream<Vertex> stream;
+        // prioritize lookup by id
+        if (searchCreate.containsKey(T.id))
+            stream = IteratorUtils.stream(graph.vertices(searchCreate.get(T.id)));
+        else
+            stream = IteratorUtils.stream(graph.vertices());
+
+        // in-memory filter is not going to be nice here. it will be up to graphs to optimize this step as they do
+        // for other Mutation steps
+        stream = stream.filter(v -> {
+            // try to match on all search criteria skipping T.id as it was handled above
+            return searchCreate.entrySet().stream().filter(kv -> kv.getKey() != T.id).allMatch(kv -> {
+                if (kv.getKey() == T.label) {
+                    return v.label().equals(kv.getValue());
+                } else {
+                    final VertexProperty<Object> vp = v.property(kv.getKey().toString());
+                    return vp.isPresent() && kv.getValue().equals(vp.value());
+                }
+            });
+        }).map(v -> {
+            // if no onMatch is defined then there is no update - return the vertex unchanged
+            if (null == onMatchTraversal) return v;
+
+            // assume good input from GraphTraversal - folks might drop in a T here even though it is immutable
+            final Map<String, Object> onMatchMap = TraversalUtil.apply(traverser, onMatchTraversal);
+            onMatchMap.forEach((key, value) -> {
+                // trigger callbacks for eventing - in this case, it's a VertexPropertyChangedEvent. if there's no
+                // registry/callbacks then just set the property
+                if (this.callbackRegistry != null && !callbackRegistry.getCallbacks().isEmpty()) {
+                    final EventStrategy eventStrategy = getTraversal().getStrategies().getStrategy(EventStrategy.class).get();
+                    final Property<Object> oldValue = eventStrategy.detach(v.property(key));
+                    final Event.VertexPropertyChangedEvent vpce = new Event.VertexPropertyChangedEvent(eventStrategy.detach(v), oldValue, value);
+                    this.callbackRegistry.getCallbacks().forEach(c -> c.accept(vpce));
+                }
+                v.property(key, value);
+            });
+
+            return v;
+        });
+
+        // if the stream has something then there is a match (possibly updated) and is returned, otherwise a new
+        // vertex is created
+        final Iterator<Vertex> vertices = stream.iterator();
+        if (vertices.hasNext()) {
+            return vertices;
+        } else {
+            final Vertex vertex;
+
+            // if there is an onCreateTraversal then the search criteria is ignored for the creation as it is provided
+            // by way of the traversal which will return the Map
+            final Map<Object,Object> m = null == onCreateTraversal ? searchCreate : TraversalUtil.apply(traverser, onCreateTraversal);
+            final List<Object> keyValues = new ArrayList<>();
+            for (Map.Entry<Object, Object> entry : m.entrySet()) {
+                keyValues.add(entry.getKey());
+                keyValues.add(entry.getValue());
+            }
+            vertex = this.getTraversal().getGraph().get().addVertex(keyValues.toArray(new Object[keyValues.size()]));
+
+            // trigger callbacks for eventing - in this case, it's a VertexAddedEvent
+            if (this.callbackRegistry != null && !callbackRegistry.getCallbacks().isEmpty()) {
+                final EventStrategy eventStrategy = getTraversal().getStrategies().getStrategy(EventStrategy.class).get();
+                final Event.VertexAddedEvent vae = new Event.VertexAddedEvent(eventStrategy.detach(vertex));
+                this.callbackRegistry.getCallbacks().forEach(c -> c.accept(vae));
+            }
+
+            return IteratorUtils.of(vertex);
+        }
+    }
+
+    @Override
+    public CallbackRegistry<Event> getMutatingCallbackRegistry() {
+        if (null == callbackRegistry) callbackRegistry = new ListCallbackRegistry<>();
+        return callbackRegistry;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = super.hashCode();
+        if (searchCreateTraversal != null)
+            result ^= searchCreateTraversal.hashCode();
+        if (onCreateTraversal != null)
+            result ^= onCreateTraversal.hashCode();
+        if (onMatchTraversal != null)
+            result ^= onMatchTraversal.hashCode();
+        return result;
+    }
+
+    @Override
+    public void reset() {
+        super.reset();
+        first = true;
+        searchCreateTraversal.reset();
+        if (onCreateTraversal != null) onCreateTraversal.reset();
+        if (onMatchTraversal != null) onMatchTraversal.reset();
+    }
+
+    @Override
+    public Set<TraverserRequirement> getRequirements() {
+        return this.getSelfAndChildRequirements();
+    }
+
+    @Override
+    public String toString() {
+        return StringFactory.stepString(this, searchCreateTraversal, onCreateTraversal, onMatchTraversal);
+    }
+
+    @Override
+    public void setTraversal(final Traversal.Admin<?, ?> parentTraversal) {
+        super.setTraversal(parentTraversal);
+        this.integrateChild(searchCreateTraversal);
+        this.integrateChild(onCreateTraversal);
+        this.integrateChild(onMatchTraversal);
+    }
+
+    @Override
+    public MergeVertexStep<S> clone() {
+        final MergeVertexStep<S> clone = (MergeVertexStep<S>) super.clone();
+        clone.searchCreateTraversal = searchCreateTraversal.clone();
+        clone.onCreateTraversal = onCreateTraversal != null ? onCreateTraversal.clone() : null;
+        clone.onMatchTraversal = onMatchTraversal != null ? onMatchTraversal.clone() : null;
+        return clone;
+    }
+}
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/DotNetTranslator.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/DotNetTranslator.java
index 4f375e5..5f3ae25 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/DotNetTranslator.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/DotNetTranslator.java
@@ -19,10 +19,10 @@
 
 package org.apache.tinkerpop.gremlin.process.traversal.translator;
 
-import org.apache.commons.configuration2.ConfigurationConverter;
 import org.apache.commons.text.StringEscapeUtils;
 import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Script;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
@@ -30,7 +30,6 @@ import org.apache.tinkerpop.gremlin.process.traversal.Translator;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.TraversalStrategyProxy;
 import org.apache.tinkerpop.gremlin.process.traversal.util.ConnectiveP;
 import org.apache.tinkerpop.gremlin.process.traversal.util.OrP;
@@ -171,7 +170,7 @@ public final class DotNetTranslator implements Translator.ScriptTranslator {
         }
 
         @Override
-        protected String getSyntax(final TraversalOptionParent.Pick o) {
+        protected String getSyntax(final Pick o) {
             return "Pick." + SymbolHelper.toCSharp(o.toString());
         }
 
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/GroovyTranslator.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/GroovyTranslator.java
index ef544b4..bfa3065 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/GroovyTranslator.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/GroovyTranslator.java
@@ -24,14 +24,12 @@ import org.apache.commons.text.StringEscapeUtils;
 import org.apache.tinkerpop.gremlin.jsr223.CoreImports;
 import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Script;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
 import org.apache.tinkerpop.gremlin.process.traversal.Translator;
-import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
-import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.TraversalStrategyProxy;
 import org.apache.tinkerpop.gremlin.process.traversal.util.ConnectiveP;
 import org.apache.tinkerpop.gremlin.process.traversal.util.OrP;
@@ -175,7 +173,7 @@ public final class GroovyTranslator implements Translator.ScriptTranslator {
         }
 
         @Override
-        protected String getSyntax(final TraversalOptionParent.Pick o) {
+        protected String getSyntax(final Pick o) {
             return "TraversalOptionParent.Pick." + o.toString();
         }
 
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/JavascriptTranslator.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/JavascriptTranslator.java
index e9cf748..f95d288 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/JavascriptTranslator.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/JavascriptTranslator.java
@@ -23,13 +23,13 @@ import org.apache.commons.configuration2.ConfigurationConverter;
 import org.apache.commons.text.StringEscapeUtils;
 import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Script;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
 import org.apache.tinkerpop.gremlin.process.traversal.Translator;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.TraversalStrategyProxy;
 import org.apache.tinkerpop.gremlin.process.traversal.util.ConnectiveP;
 import org.apache.tinkerpop.gremlin.process.traversal.util.OrP;
@@ -167,7 +167,7 @@ public final class JavascriptTranslator implements Translator.ScriptTranslator {
         }
 
         @Override
-        protected String getSyntax(final TraversalOptionParent.Pick o) {
+        protected String getSyntax(final Pick o) {
             return "Pick." + o.toString();
         }
 
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/PythonTranslator.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/PythonTranslator.java
index 09e4447..987fa3e 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/PythonTranslator.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/translator/PythonTranslator.java
@@ -23,6 +23,7 @@ import org.apache.commons.configuration2.ConfigurationConverter;
 import org.apache.commons.text.StringEscapeUtils;
 import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Script;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
@@ -30,7 +31,6 @@ import org.apache.tinkerpop.gremlin.process.traversal.Translator;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.TraversalStrategyProxy;
 import org.apache.tinkerpop.gremlin.process.traversal.util.ConnectiveP;
 import org.apache.tinkerpop.gremlin.process.traversal.util.OrP;
@@ -188,7 +188,7 @@ public final class PythonTranslator implements Translator.ScriptTranslator {
         }
 
         @Override
-        protected String getSyntax(final TraversalOptionParent.Pick o) {
+        protected String getSyntax(final Pick o) {
             return "Pick." + resolveSymbol(o.toString());
         }
 
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/TypeSerializerRegistry.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/TypeSerializerRegistry.java
index ced0088..0c4b913 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/TypeSerializerRegistry.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/TypeSerializerRegistry.java
@@ -18,6 +18,7 @@
  */
 package org.apache.tinkerpop.gremlin.structure.io.binary;
 
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.structure.io.binary.types.*;
 import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
 import org.apache.tinkerpop.gremlin.process.traversal.Operator;
@@ -30,7 +31,6 @@ import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy;
 import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.BulkSet;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.Tree;
 import org.apache.tinkerpop.gremlin.process.traversal.util.AndP;
@@ -119,7 +119,7 @@ public class TypeSerializerRegistry {
             new RegistryEntry<>(Direction.class, EnumSerializer.DirectionSerializer),
             new RegistryEntry<>(Operator.class, EnumSerializer.OperatorSerializer),
             new RegistryEntry<>(Order.class, EnumSerializer.OrderSerializer),
-            new RegistryEntry<>(TraversalOptionParent.Pick.class, EnumSerializer.PickSerializer),
+            new RegistryEntry<>(Pick.class, EnumSerializer.PickSerializer),
             new RegistryEntry<>(Pop.class, EnumSerializer.PopSerializer),
             new RegistryEntry<>(Lambda.class, new LambdaSerializer()),
             new RegistryEntry<>(P.class, new PSerializer<>(DataType.P, P.class)),
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/types/EnumSerializer.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/types/EnumSerializer.java
index 12e2d15..52b4c08 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/types/EnumSerializer.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/binary/types/EnumSerializer.java
@@ -18,6 +18,7 @@
  */
 package org.apache.tinkerpop.gremlin.structure.io.binary.types;
 
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.structure.io.binary.DataType;
 import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryReader;
 import org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter;
@@ -26,7 +27,6 @@ import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.structure.Column;
 import org.apache.tinkerpop.gremlin.structure.Direction;
 import org.apache.tinkerpop.gremlin.structure.T;
@@ -49,7 +49,7 @@ public class EnumSerializer<E extends Enum> extends SimpleTypeSerializer<E> {
     public static final EnumSerializer<Direction> DirectionSerializer = new EnumSerializer<>(DataType.DIRECTION, Direction::valueOf);
     public static final EnumSerializer<Operator> OperatorSerializer = new EnumSerializer<>(DataType.OPERATOR, Operator::valueOf);
     public static final EnumSerializer<Order> OrderSerializer = new EnumSerializer<>(DataType.ORDER, Order::valueOf);
-    public static final EnumSerializer<TraversalOptionParent.Pick> PickSerializer = new EnumSerializer<>(DataType.PICK, TraversalOptionParent.Pick::valueOf);
+    public static final EnumSerializer<Pick> PickSerializer = new EnumSerializer<>(DataType.PICK, Pick::valueOf);
     public static final EnumSerializer<Pop> PopSerializer = new EnumSerializer<>(DataType.POP, Pop::valueOf);
     public static final EnumSerializer<Scope> ScopeSerializer = new EnumSerializer<>(DataType.SCOPE, Scope::valueOf);
     public static final EnumSerializer<T> TSerializer = new EnumSerializer<>(DataType.T, T::valueOf);
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONModule.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONModule.java
index eda0d37..fccab3f 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONModule.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONModule.java
@@ -25,6 +25,7 @@ import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
 import org.apache.tinkerpop.gremlin.process.traversal.Path;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
@@ -32,7 +33,6 @@ import org.apache.tinkerpop.gremlin.process.traversal.TextP;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy;
 import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.BulkSet;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.Tree;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.ConnectiveStrategy;
@@ -178,7 +178,7 @@ abstract class GraphSONModule extends TinkerPopJacksonModule {
                             Order.class,
                             Pop.class,
                             SackFunctions.Barrier.class,
-                            TraversalOptionParent.Pick.class,
+                            Pick.class,
                             Scope.class,
                             T.class).forEach(e -> put(e, e.getSimpleName()));
                     Arrays.asList(
@@ -262,7 +262,7 @@ abstract class GraphSONModule extends TinkerPopJacksonModule {
                     Pop.class,
                     SackFunctions.Barrier.class,
                     Scope.class,
-                    TraversalOptionParent.Pick.class,
+                    Pick.class,
                     T.class).forEach(e -> addSerializer(e, new TraversalSerializersV3d0.EnumJacksonSerializer()));
             addSerializer(P.class, new TraversalSerializersV3d0.PJacksonSerializer());
             addSerializer(Lambda.class, new TraversalSerializersV3d0.LambdaJacksonSerializer());
@@ -304,7 +304,7 @@ abstract class GraphSONModule extends TinkerPopJacksonModule {
                     Pop.values(),
                     SackFunctions.Barrier.values(),
                     Scope.values(),
-                    TraversalOptionParent.Pick.values(),
+                    Pick.values(),
                     T.values()).flatMap(Stream::of).forEach(e -> addDeserializer(e.getClass(), new TraversalSerializersV3d0.EnumJacksonDeserializer(e.getDeclaringClass())));
             addDeserializer(P.class, new TraversalSerializersV3d0.PJacksonDeserializer());
             addDeserializer(TextP.class, new TraversalSerializersV3d0.TextPJacksonDeserializer());
@@ -416,7 +416,7 @@ abstract class GraphSONModule extends TinkerPopJacksonModule {
                             Order.class,
                             Pop.class,
                             SackFunctions.Barrier.class,
-                            TraversalOptionParent.Pick.class,
+                            Pick.class,
                             Scope.class,
                             T.class).forEach(e -> put(e, e.getSimpleName()));
                     Arrays.asList(
@@ -496,7 +496,7 @@ abstract class GraphSONModule extends TinkerPopJacksonModule {
                     Pop.class,
                     SackFunctions.Barrier.class,
                     Scope.class,
-                    TraversalOptionParent.Pick.class,
+                    Pick.class,
                     T.class).forEach(e -> addSerializer(e, new TraversalSerializersV2d0.EnumJacksonSerializer()));
             addSerializer(P.class, new TraversalSerializersV2d0.PJacksonSerializer());
             addSerializer(Lambda.class, new TraversalSerializersV2d0.LambdaJacksonSerializer());
@@ -532,7 +532,7 @@ abstract class GraphSONModule extends TinkerPopJacksonModule {
                     Pop.values(),
                     SackFunctions.Barrier.values(),
                     Scope.values(),
-                    TraversalOptionParent.Pick.values(),
+                    Pick.values(),
                     T.values()).flatMap(Stream::of).forEach(e -> addDeserializer(e.getClass(), new TraversalSerializersV2d0.EnumJacksonDeserializer(e.getDeclaringClass())));
             addDeserializer(P.class, new TraversalSerializersV2d0.PJacksonDeserializer());
             addDeserializer(TextP.class, new TraversalSerializersV2d0.TextPJacksonDeserializer());
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV2d0.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV2d0.java
index 3fdb50a..e50037c 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV2d0.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV2d0.java
@@ -21,11 +21,11 @@ package org.apache.tinkerpop.gremlin.structure.io.graphson;
 import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.Path;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.util.Metrics;
 import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalMetrics;
 import org.apache.tinkerpop.gremlin.structure.Column;
@@ -131,8 +131,8 @@ public class GraphSONTypeSerializerV2d0 extends AbstractGraphSONTypeSerializer {
             mapped = Pop.class;
         else if (SackFunctions.Barrier.class.isAssignableFrom(c))
             mapped = SackFunctions.Barrier.class;
-        else if (TraversalOptionParent.Pick.class.isAssignableFrom(c))
-            mapped = TraversalOptionParent.Pick.class;
+        else if (Pick.class.isAssignableFrom(c))
+            mapped = Pick.class;
         else if (Scope.class.isAssignableFrom(c))
             mapped = Scope.class;
         else if (T.class.isAssignableFrom(c))
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV3d0.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV3d0.java
index eca91ef..4349e47 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV3d0.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONTypeSerializerV3d0.java
@@ -21,11 +21,11 @@ package org.apache.tinkerpop.gremlin.structure.io.graphson;
 import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.Path;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.BulkSet;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.Tree;
 import org.apache.tinkerpop.gremlin.process.traversal.util.Metrics;
@@ -165,8 +165,8 @@ public class GraphSONTypeSerializerV3d0 extends AbstractGraphSONTypeSerializer {
             mapped = Pop.class;
         else if (SackFunctions.Barrier.class.isAssignableFrom(c))
             mapped = SackFunctions.Barrier.class;
-        else if (TraversalOptionParent.Pick.class.isAssignableFrom(c))
-            mapped = TraversalOptionParent.Pick.class;
+        else if (Pick.class.isAssignableFrom(c))
+            mapped = Pick.class;
         else if (Scope.class.isAssignableFrom(c))
             mapped = Scope.class;
         else if (T.class.isAssignableFrom(c))
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/gryo/GryoVersion.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/gryo/GryoVersion.java
index bd2b1b0..eda92fe 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/gryo/GryoVersion.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/gryo/GryoVersion.java
@@ -30,11 +30,11 @@ import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
 import org.apache.tinkerpop.gremlin.process.traversal.Path;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.step.filter.RangeGlobalStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.FoldStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.GroupCountStep;
@@ -329,7 +329,7 @@ public enum GryoVersion {
             add(GryoTypeReg.of(Column.class, 132));
             add(GryoTypeReg.of(Pop.class, 133));
             add(GryoTypeReg.of(SackFunctions.Barrier.class, 135));
-            add(GryoTypeReg.of(TraversalOptionParent.Pick.class, 137));
+            add(GryoTypeReg.of(Pick.class, 137));
             add(GryoTypeReg.of(HashSetSupplier.class, 136, new UtilSerializers.HashSetSupplierSerializer()));
             add(GryoTypeReg.of(MultiComparator.class, 165));
 
@@ -529,7 +529,7 @@ public enum GryoVersion {
             add(GryoTypeReg.of(Column.class, 132));
             add(GryoTypeReg.of(Pop.class, 133));
             add(GryoTypeReg.of(SackFunctions.Barrier.class, 135));
-            add(GryoTypeReg.of(TraversalOptionParent.Pick.class, 137));
+            add(GryoTypeReg.of(Pick.class, 137));
             add(GryoTypeReg.of(HashSetSupplier.class, 136, new UtilSerializers.HashSetSupplierSerializer()));
             add(GryoTypeReg.of(MultiComparator.class, 165));
 
diff --git a/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStepTest.java b/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStepTest.java
index f68af08..629ea72 100644
--- a/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStepTest.java
+++ b/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchStepTest.java
@@ -28,7 +28,7 @@ import java.util.List;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.in;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.out;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.values;
-import static org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick.none;
+import static org.apache.tinkerpop.gremlin.process.traversal.Pick.none;
 
 /**
  * @author Daniel Kuppitz (http://gremlin.guru)
diff --git a/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStepTest.java b/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStepTest.java
index 885da77..604ae20 100644
--- a/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStepTest.java
+++ b/gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseStepTest.java
@@ -29,7 +29,7 @@ import java.util.List;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.in;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.out;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.values;
-import static org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick.none;
+import static org.apache.tinkerpop.gremlin.process.traversal.Pick.none;
 
 /**
  * @author Daniel Kuppitz (http://gremlin.guru)
diff --git a/gremlin-driver/src/test/java/org/apache/tinkerpop/gremlin/driver/ser/binary/GraphBinaryReaderWriterRoundTripTest.java b/gremlin-driver/src/test/java/org/apache/tinkerpop/gremlin/driver/ser/binary/GraphBinaryReaderWriterRoundTripTest.java
index 3fd54e2..1800331 100644
--- a/gremlin-driver/src/test/java/org/apache/tinkerpop/gremlin/driver/ser/binary/GraphBinaryReaderWriterRoundTripTest.java
+++ b/gremlin-driver/src/test/java/org/apache/tinkerpop/gremlin/driver/ser/binary/GraphBinaryReaderWriterRoundTripTest.java
@@ -27,13 +27,13 @@ import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
 import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.BulkSet;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.Tree;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.TraversalStrategyProxy;
@@ -221,7 +221,7 @@ public class GraphBinaryReaderWriterRoundTripTest {
                 new Object[] {"Operator", Operator.sum, null},
                 new Object[] {"Operator", Operator.div, null},
                 new Object[] {"Order", Order.desc, null},
-                new Object[] {"Pick", TraversalOptionParent.Pick.any, null},
+                new Object[] {"Pick", Pick.any, null},
                 new Object[] {"Pop", Pop.mixed, null},
                 new Object[] {"Scope", Scope.global, null},
                 new Object[] {"T", T.label, null},
diff --git a/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js b/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js
index 52bb2c7..23d914d 100644
--- a/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js
+++ b/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js
@@ -486,346 +486,4 @@ const gremlins = {
     g_withStrategiesXProductiveByStrategyX_V_aggregateXaX_byXfooX_capXaX_unfold_mean: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate("a").by("foo").cap("a").unfold().mean() }], 
     g_injectXnull_10_20_nullX_mean: [function({g, xx1, xx2}) { return g.inject(null,xx1,xx2,null).mean() }], 
     g_injectXlistXnull_10_20_nullXX_meanXlocalX: [function({g, xx1}) { return g.inject(xx1).mean(Scope.local) }], 
-    g_V_age_min: [function({g}) { return g.V().values("age").min() }], 
-    g_V_foo_min: [function({g}) { return g.V().values("foo").min() }], 
-    g_V_name_min: [function({g}) { return g.V().values("name").min() }], 
-    g_V_age_fold_minXlocalX: [function({g}) { return g.V().values("age").fold().min(Scope.local) }], 
-    g_V_aggregateXaX_byXageX_capXaX_minXlocalX: [function({g}) { return g.V().aggregate("a").by("age").cap("a").min(Scope.local) }], 
-    g_withStrategiesXProductiveByStrategyX_V_aggregateXaX_byXageX_capXaX_minXlocalX: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate("a").by("age").cap("a").min(Scope.local) }], 
-    g_V_aggregateXaX_byXageX_capXaX_unfold_min: [function({g}) { return g.V().aggregate("a").by("age").cap("a").unfold().min() }], 
-    g_withStrategiesXProductiveByStrategyX_V_aggregateXaX_byXageX_capXaX_unfold_min: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate("a").by("age").cap("a").unfold().min() }], 
-    g_V_aggregateXaX_byXfooX_capXaX_minXlocalX: [function({g}) { return g.V().aggregate("a").by("foo").cap("a").min(Scope.local) }], 
-    g_withStrategiesXProductiveByStrategyX_V_aggregateXaX_byXfooX_capXaX_minXlocalX: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate("a").by("foo").cap("a").min(Scope.local) }], 
-    g_V_aggregateXaX_byXfooX_capXaX_unfold_min: [function({g}) { return g.V().aggregate("a").by("foo").cap("a").unfold().min() }], 
-    g_withStrategiesXProductiveByStrategyX_V_aggregateXaX_byXfooX_capXaX_unfold_min: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate("a").by("foo").cap("a").unfold().min() }], 
-    g_V_foo_fold_minXlocalX: [function({g}) { return g.V().values("foo").fold().min(Scope.local) }], 
-    g_V_name_fold_minXlocalX: [function({g}) { return g.V().values("name").fold().min(Scope.local) }], 
-    g_V_repeatXbothX_timesX5X_age_min: [function({g}) { return g.V().repeat(__.both()).times(5).values("age").min() }], 
-    g_V_hasLabelXsoftwareX_group_byXnameX_byXbothE_weight_minX: [function({g}) { return g.V().hasLabel("software").group().by("name").by(__.bothE().values("weight").min()) }], 
-    g_V_foo_injectX9999999999X_min: [function({g, xx1}) { return g.V().values("foo").inject(xx1).min() }], 
-    g_V_name_order: [function({g}) { return g.V().values("name").order() }], 
-    g_V_name_order_byXa1_b1X_byXb2_a2X: [function({g, c1, c2}) { return g.V().values("name").order().by(c1).by(c2) }], 
-    g_V_order_byXname_ascX_name: [function({g}) { return g.V().order().by("name",Order.asc).values("name") }], 
-    g_V_order_byXnameX_name: [function({g}) { return g.V().order().by("name").values("name") }], 
-    g_V_outE_order_byXweight_descX_weight: [function({g}) { return g.V().outE().order().by("weight",Order.desc).values("weight") }], 
-    g_V_order_byXname_a1_b1X_byXname_b2_a2X_name: [function({g, c1, c2}) { return g.V().order().by("name",c1).by("name",c2).values("name") }], 
-    g_V_asXaX_outXcreatedX_asXbX_order_byXshuffleX_selectXa_bX: [function({g}) { return g.V().as("a").out("created").as("b").order().by(Order.shuffle).select("a","b") }], 
-    g_V_both_hasLabelXpersonX_order_byXage_descX_limitX5X_name: [function({g}) { return g.V().both().hasLabel("person").order().by("age",Order.desc).limit(5).values("name") }], 
-    g_V_properties_order_byXkey_descX_key: [function({g}) { return g.V().properties().order().by(T.key,Order.desc).key() }], 
-    g_V_hasLabelXpersonX_order_byXvalueXageX_descX_name: [function({g, l1}) { return g.V().hasLabel("person").order().by(l1,Order.desc).values("name") }], 
-    g_V_hasLabelXpersonX_group_byXnameX_byXoutE_weight_sumX_orderXlocalX_byXvaluesX: [function({g}) { return g.V().hasLabel("person").group().by("name").by(__.outE().values("weight").sum()).order(Scope.local).by(Column.values) }], 
-    g_V_mapXbothE_weight_foldX_order_byXsumXlocalX_descX: [function({g}) { return g.V().map(__.bothE().values("weight").order().by(Order.asc).fold()).order().by(__.sum(Scope.local),Order.desc) }], 
-    g_V_group_byXlabelX_byXname_order_byXdescX_foldX: [function({g}) { return g.V().group().by(T.label).by(__.values("name").order().by(Order.desc).fold()) }], 
-    g_V_hasLabelXpersonX_group_byXnameX_byXoutE_weight_sumX_unfold_order_byXvalues_descX: [function({g}) { return g.V().hasLabel("person").group().by("name").by(__.outE().values("weight").sum()).unfold().order().by(Column.values,Order.desc) }], 
-    g_V_asXvX_mapXbothE_weight_foldX_sumXlocalX_asXsX_selectXv_sX_order_byXselectXsX_descX: [function({g}) { return g.V().as("v").map(__.bothE().values("weight").fold()).sum(Scope.local).as("s").select("v","s").order().by(__.select("s"),Order.desc) }], 
-    g_V_hasLabelXpersonX_fold_orderXlocalX_byXageX: [function({g}) { return g.V().hasLabel("person").fold().order(Scope.local).by("age") }], 
-    g_V_both_hasLabelXpersonX_order_byXage_descX_name: [function({g}) { return g.V().both().hasLabel("person").order().by("age",Order.desc).values("name") }], 
-    g_V_order_byXoutE_count_descX: [function({g}) { return g.V().order().by(__.outE().count(),Order.desc) }], 
-    g_V_hasLabelXpersonX_order_byXageX: [function({g}) { return g.V().hasLabel("person").order().by("age") }], 
-    g_V_order_byXageX: [function({g}) { return g.V().order().by("age") }], 
-    g_V_fold_orderXlocalX_byXageX: [function({g}) { return g.V().fold().order(Scope.local).by("age") }], 
-    g_V_fold_orderXlocalX_byXage_descX: [function({g}) { return g.V().fold().order(Scope.local).by("age",Order.desc) }], 
-    g_V_orXhasLabelXpersonX_hasXsoftware_name_lopXX_order_byXageX: [function({g}) { return g.V().or(__.hasLabel("person"),__.has("software","name","lop")).order().by("age") }], 
-    g_withStrategiesXProductiveByStrategyX_V_orXhasLabelXpersonX_hasXsoftware_name_lopXX_order_byXageX: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().or(__.hasLabel("person"),__.has("software","name","lop")).order().by("age") }], 
-    g_VX1X_hasXlabel_personX_mapXmapXint_ageXX_orderXlocalX_byXvalues_descX_byXkeys_ascX: [function({g, l1, v1}) { return g.V(v1).hasLabel("person").map(l1).order(Scope.local).by(Column.values,Order.desc).by(Column.keys,Order.asc) }], 
-    g_V_hasXsong_name_OHBOYX_outXfollowedByX_outXfollowedByX_order_byXperformancesX_byXsongType_descX: [function({g}) { return g.V().has("song","name","OH BOY").out("followedBy").out("followedBy").order().by("performances").by("songType",Order.desc).by("name") }], 
-    g_V_hasLabelXsongX_order_byXperformances_descX_byXnameX_rangeX110_120X_name: [function({g}) { return g.V().hasLabel("song").order().by("performances",Order.desc).by("name").range(110,120).values("name") }], 
-    g_VX1X_elementMap_orderXlocalX_byXkeys_descXunfold: [function({g, vid1}) { return g.V(vid1).elementMap().order(Scope.local).by(Column.keys,Order.desc).unfold() }], 
-    g_VX1X_elementMap_orderXlocalX_byXkeys_ascXunfold: [function({g, vid1}) { return g.V(vid1).elementMap().order(Scope.local).by(Column.keys,Order.asc).unfold() }], 
-    g_V_pageRank_hasXpageRankX: [function({g}) { return g.V().pageRank().has("gremlin.pageRankVertexProgram.pageRank") }], 
-    g_V_outXcreatedX_pageRank_withXedges_bothEX_withXpropertyName_projectRankX_withXtimes_0X_valueMapXname_projectRankX: [function({g}) { return g.V().out("created").pageRank().with_("~tinkerpop.pageRank.edges",__.bothE()).with_("~tinkerpop.pageRank.propertyName","projectRank").with_("~tinkerpop.pageRank.times",0).valueMap("name","projectRank") }], 
-    g_V_pageRank_order_byXpageRank_descX_byXnameX_name: [function({g}) { return g.V().pageRank().order().by("gremlin.pageRankVertexProgram.pageRank",Order.desc).by("name").values("name") }], 
-    g_V_pageRank_order_byXpageRank_descX_name_limitX2X: [function({g}) { return g.V().pageRank().order().by("gremlin.pageRankVertexProgram.pageRank",Order.desc).values("name").limit(2) }], 
-    g_V_pageRank_withXedges_outEXknowsXX_withXpropertyName_friendRankX_project_byXnameX_byXvaluesXfriendRankX_mathX: [function({g}) { return g.V().pageRank().with_("~tinkerpop.pageRank.edges",__.outE("knows")).with_("~tinkerpop.pageRank.propertyName","friendRank").project("name","friendRank").by("name").by(__.values("friendRank").math("ceil(_ * 100)")) }], 
-    g_V_hasLabelXpersonX_pageRank_withXpropertyName_kpageRankX_project_byXnameX_byXvaluesXpageRankX_mathX: [function({g}) { return g.V().hasLabel("person").pageRank().with_("~tinkerpop.pageRank.propertyName","pageRank").project("name","pageRank").by("name").by(__.values("pageRank").math("ceil(_ * 100)")) }], 
-    g_V_pageRank_withXpropertyName_pageRankX_asXaX_outXknowsX_pageRank_asXbX_selectXa_bX_by_byXmathX: [function({g}) { return g.V().pageRank().with_("~tinkerpop.pageRank.propertyName","pageRank").as("a").out("knows").values("pageRank").as("b").select("a","b").by().by(__.math("ceil(_ * 100)")) }], 
-    g_V_hasLabelXsoftwareX_hasXname_rippleX_pageRankX1X_withXedges_inEXcreatedX_withXtimes_1X_withXpropertyName_priorsX_inXcreatedX_unionXboth__identityX_valueMapXname_priorsX: [function({g}) { return g.V().hasLabel("software").has("name","ripple").pageRank(1.0).with_("~tinkerpop.pageRank.edges",__.inE("created")).with_("~tinkerpop.pageRank.times",1).with_("~tinkerpop.pageRank.propertyName","priors").in_("created").union(__.both(),__.identity()).valueMap("name","priors") }], 
-    g_V_outXcreatedX_groupXmX_byXlabelX_pageRankX1X_withXpropertyName_pageRankX_withXedges_inEX_withXtimes_1X_inXcreatedX_groupXmX_byXpageRankX_capXmX: [function({g}) { return g.V().out("created").group("m").by(T.label).pageRank(1.0).with_("~tinkerpop.pageRank.propertyName","pageRank").with_("~tinkerpop.pageRank.edges",__.inE()).with_("~tinkerpop.pageRank.times",1).in_("created").group("m").by("pageRank").cap("m") }], 
-    g_VX1X_name_path: [function({g, vid1}) { return g.V(vid1).values("name").path() }], 
-    g_VX1X_out_path_byXageX_byXnameX: [function({g, vid1}) { return g.V(vid1).out().path().by("age").by("name") }], 
-    g_V_repeatXoutX_timesX2X_path_byXitX_byXnameX_byXlangX: [function({g}) { return g.V().repeat(__.out()).times(2).path().by().by("name").by("lang") }], 
-    g_V_out_out_path_byXnameX_byXageX: [function({g}) { return g.V().out().out().path().by("name").by("age") }], 
-    g_V_asXaX_hasXname_markoX_asXbX_hasXage_29X_asXcX_path: [function({g}) { return g.V().as("a").has("name","marko").as("b").has("age",29).as("c").path() }], 
-    g_VX1X_outEXcreatedX_inV_inE_outV_path: [function({g, vid1}) { return g.V(vid1).outE("created").inV().inE().outV().path() }], 
-    g_V_asXaX_out_asXbX_out_asXcX_path_fromXbX_toXcX_byXnameX: [function({g}) { return g.V().as("a").out().as("b").out().as("c").path().from_("b").to("c").by("name") }], 
-    g_VX1X_out_path_byXageX: [function({g, vid1}) { return g.V(vid1).out().path().by("age") }], 
-    g_withStrategiesXProductiveByStrategyX_VX1X_out_path_byXageX: [function({g, vid1}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V(vid1).out().path().by("age") }], 
-    g_injectX1_null_nullX_path: [function({g}) { return g.inject(1,null,null).path() }], 
-    g_injectX1_null_nullX_path_dedup: [function({g}) { return g.inject(1,null,null).path().dedup() }], 
-    g_V_peerPressure_hasXclusterX: [function({g}) { return g.V().peerPressure().has("gremlin.peerPressureVertexProgram.cluster") }], 
-    g_V_peerPressure_withXpropertyName_clusterX_withXedges_outEXknowsXX_pageRankX1X_byXrankX_withXedges_outEXknowsX_withXtimes_2X_group_byXclusterX_byXrank_sumX_limitX100X: [function({g}) { return g.V().peerPressure().with_("~tinkerpop.peerPressure.propertyName","cluster").with_("~tinkerpop.peerPressure.edges",__.outE("knows")).pageRank(1.0).with_("~tinkerpop.pageRank.propertyName","rank").with_("~tinkerpop.pageRank.edges",__.outE("knows")).with_("~tinkerpop.pageRank.times",1).group().by [...]
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-    g_EX11X_propertiesXweightX_asXaX_selectXaX_byXkeyX: [function({g, eid11}) { return g.E(eid11).properties("weight").as("a").select("a").by(T.key) }], 
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-    g_withStrategiesXProductiveByStrategyX_V_aggregateXaX_byXfooX_capXaX_unfold_sum: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate("a").by("foo").cap("a").unfold().sum() }], 
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-    g_V_valueMapXtrueX: [function({g}) { return g.V().valueMap(true) }], 
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-    g_V_valueMapXtrue_name_ageX: [function({g}) { return g.V().valueMap(true,"name","age") }], 
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-    g_V_hasLabelXpersonX_filterXoutEXcreatedXX_valueMapXtrueX: [function({g}) { return g.V().hasLabel("person").filter(__.outE("created")).valueMap(true) }], 
-    g_V_hasLabelXpersonX_filterXoutEXcreatedXX_valueMap_withXtokensX: [function({g}) { return g.V().hasLabel("person").filter(__.outE("created")).valueMap().with_("~tinkerpop.valueMap.tokens") }], 
-    g_VX1X_valueMapXname_locationX_byXunfoldX_by: [function({g, vid1}) { return g.V(vid1).valueMap("name","location").by(__.unfold()).by() }], 
-    g_V_valueMapXname_age_nullX: [function({g}) { return g.V().valueMap("name","age",null) }], 
-    g_V_valueMapXname_ageX_byXisXxXXbyXunfoldX: [function({g}) { return g.V().valueMap("name","age").by(__.is("x")).by(__.unfold()) }], 
-    g_VXnullX: [function({g}) { return g.V(null) }], 
-    g_VXlistXnullXX: [function({g, xx1}) { return g.V(xx1) }], 
-    g_VX1_nullX: [function({g, vid1}) { return g.V(vid1,null) }], 
-    g_VXlistX1_2_3XX_name: [function({g, xx1}) { return g.V(xx1).values("name") }], 
-    g_VXlistXv1_v2_v3XX_name: [function({g, xx1}) { return g.V(xx1).values("name") }], 
-    g_V: [function({g}) { return g.V() }], 
-    g_VXv1X_out: [function({g, v1}) { return g.V(v1).out() }], 
-    g_VX1X_out: [function({g, vid1}) { return g.V(vid1).out() }], 
-    g_VX2X_in: [function({g, vid2}) { return g.V(vid2).in_() }], 
-    g_VX4X_both: [function({g, vid4}) { return g.V(vid4).both() }], 
-    g_E: [function({g}) { return g.E() }], 
-    g_EX11X: [function({g, eid11}) { return g.E(eid11) }], 
-    g_EX11AsStringX: [function({g, eid11}) { return g.E(eid11) }], 
-    g_EXe11X: [function({g, e11}) { return g.E(e11) }], 
-    g_EXe7_e11X: [function({g, e7, e11}) { return g.E(e7,e11) }], 
-    g_EXlistXe7_e11XX: [function({g, xx1}) { return g.E(xx1) }], 
-    g_EXnullX: [function({g}) { return g.E(null) }], 
-    g_EXlistXnullXX: [function({g, xx1}) { return g.E(xx1) }], 
-    g_EX11_nullX: [function({g, eid11}) { return g.E(eid11,null) }], 
-    g_VX1X_outE: [function({g, vid1}) { return g.V(vid1).outE() }], 
-    g_VX2X_outE: [function({g, vid2}) { return g.V(vid2).inE() }], 
-    g_VX4X_bothEXcreatedX: [function({g, vid4}) { return g.V(vid4).bothE("created") }], 
-    g_VX4X_bothE: [function({g, vid4}) { return g.V(vid4).bothE() }], 
-    g_VX1X_outE_inV: [function({g, vid1}) { return g.V(vid1).both() }], 
-    g_VX2X_inE_outV: [function({g, vid2}) { return g.V(vid2).inE().outV() }], 
-    g_V_outE_hasXweight_1X_outV: [function({g}) { return g.V().outE().has("weight",1.0).outV() }], 
-    g_V_out_outE_inV_inE_inV_both_name: [function({g}) { return g.V().out().outE().inV().inE().inV().both().values("name") }], 
-    g_VX1X_outEXknowsX_bothV_name: [function({g, vid1}) { return g.V(vid1).outE("knows").bothV().values("name") }], 
-    g_VX1X_outE_otherV: [function({g, vid1}) { return g.V(vid1).outE().otherV() }], 
-    g_VX4X_bothE_otherV: [function({g, vid4}) { return g.V(vid4).bothE().otherV() }], 
-    g_VX4X_bothE_hasXweight_lt_1X_otherV: [function({g, vid4}) { return g.V(vid4).bothE().has("weight",P.lt(1.0)).otherV() }], 
-    g_VX2X_inE: [function({g, vid2}) { return g.V(vid2).bothE() }], 
-    get_g_VX1X_outE_otherV: [function({g, vid1}) { return g.V(vid1).outE().otherV() }], 
-    g_VX1X_outXknowsX: [function({g, vid1}) { return g.V(vid1).out("knows") }], 
-    g_VX1AsStringX_outXknowsX: [function({g, vid1}) { return g.V(vid1).out("knows") }], 
-    g_VX1X_outXknows_createdX: [function({g, vid1}) { return g.V(vid1).out("knows","created") }], 
-    g_VX1X_outEXknowsX_inV: [function({g, vid1}) { return g.V(vid1).outE("knows").inV() }], 
-    g_VX1X_outEXknows_createdX_inV: [function({g, vid1}) { return g.V(vid1).outE("knows","created").inV() }], 
-    g_V_out_out: [function({g}) { return g.V().out().out() }], 
-    g_VX1X_out_out_out: [function({g, vid1}) { return g.V(vid1).out().out().out() }], 
-    g_VX1X_out_name: [function({g, vid1}) { return g.V(vid1).out().values("name") }], 
-    g_VX1X_to_XOUT_knowsX: [function({g, vid1}) { return g.V(vid1).to(Direction.OUT,"knows") }], 
-    g_VX1_2_3_4X_name: [function({g, vid4, vid3, vid2, vid1}) { return g.addV("person").property("name","marko").property("age",29).as("marko").addV("person").property("name","vadas").property("age",27).as("vadas").addV("software").property("name","lop").property("lang","java").as("lop").addV("person").property("name","josh").property("age",32).as("josh").addV("software").property("name","ripple").property("lang","java").as("ripple").addV("person").property("name","peter").property("age" [...]
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-    g_V_hasLabelXloopsX_bothXselfX: [function({g}) { return g.V().hasLabel("loops").both("self") }], 
-    g_injectX1X_VXnullX: [function({g}) { return g.inject(1).V(null) }], 
-    g_injectX1X_VX1_nullX: [function({g, vid1}) { return g.inject(1).V(vid1,null) }], 
-    Primitives_Number_eqXbyteX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    Primitives_Number_eqXshortX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    Primitives_Number_eqXintX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    Primitives_Number_eqXlongX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    Primitives_Number_eqXbigintX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    Primitives_Number_eqXfloatX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    Primitives_Number_eqXdoubleX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    Primitives_Number_eqXbigdecimalX: [function({g, xx1, xx2}) { return g.inject(xx1).unfold().where(__.is(xx2)) }], 
-    g_V_valueXnameX_aggregateXxX_capXxX: [function({g}) { return g.V().values("name").aggregate("x").cap("x") }], 
-    g_V_valueXnameX_aggregateXglobal_xX_capXxX: [function({g}) { return g.V().values("name").aggregate(Scope.global,"x").cap("x") }], 
-    g_V_aggregateXxX_byXnameX_capXxX: [function({g}) { return g.V().aggregate("x").by("name").cap("x") }], 
-    g_V_out_aggregateXaX_path: [function({g}) { return g.V().out().aggregate("a").path() }], 
-    g_V_hasLabelXpersonX_aggregateXxX_byXageX_capXxX_asXyX_selectXyX: [function({g}) { return g.V().hasLabel("person").aggregate("x").by("age").cap("x").as("y").select("y") }], 
-    g_V_aggregateXxX_byXageX_capXxX: [function({g}) { return g.V().aggregate("x").by("age").cap("x") }], 
-    g_V_aggregateXlocal_xX_byXageX_capXxX: [function({g}) { return g.V().aggregate(Scope.local,"x").by("age").cap("x") }], 
-    g_withStrategiesXProductiveByStrategyX_V_aggregateXlocal_xX_byXageX_capXxX: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate(Scope.local,"x").by("age").cap("x") }], 
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-    g_VX1X_aggregateXlocal_aX_byXnameX_out_aggregateXlocal_aX_byXnameX_name_capXaX: [function({g, vid1}) { return g.V(vid1).aggregate(Scope.local,"a").by("name").out().aggregate(Scope.local,"a").by("name").values("name").cap("a") }], 
-    g_withSideEffectXa_setX_V_both_name_aggregateXlocal_aX_capXaX: [function({g, xx1}) { return g.withSideEffect("a",xx1).V().both().values("name").aggregate(Scope.local,"a").cap("a") }], 
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-    g_V_aggregateXxX_byXvaluesXageX_isXgtX29XXX_capXxX: [function({g}) { return g.V().aggregate("x").by(__.values("age").is(P.gt(29))).cap("x") }], 
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-    g_V_aggregateXxX_byXout_order_byXnameXX_capXxX: [function({g}) { return g.V().aggregate("x").by(__.out().order().by("name")).cap("x") }], 
-    g_withStrategiesXProductiveByStrategyX_V_aggregateXxX_byXout_order_byXnameXX_capXxX: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().aggregate("x").by(__.out().order().by("name")).cap("x") }], 
-    g_V_fail: [function({g}) { return g.V().fail() }], 
-    g_V_failXmsgX: [function({g}) { return g.V().fail("msg") }], 
-    g_V_unionXout_failX: [function({g}) { return g.V().union(__.out(),__.fail()) }], 
-    g_V_group_byXnameX: [function({g}) { return g.V().group().by("name") }], 
-    g_V_group_byXageX: [function({g}) { return g.V().group().by("age") }], 
-    g_withStrategiesXProductiveByStrategyX_V_group_byXageX: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().group().by("age") }], 
-    g_V_group_byXnameX_byXageX: [function({g}) { return g.V().group().by("name").by("age") }], 
-    g_V_group_byXnameX_by: [function({g}) { return g.V().group().by("name").by() }], 
-    g_V_groupXaX_byXnameX_capXaX: [function({g}) { return g.V().group("a").by("name").cap("a") }], 
-    g_V_hasXlangX_groupXaX_byXlangX_byXnameX_out_capXaX: [function({g}) { return g.V().has("lang").group("a").by("lang").by("name").out().cap("a") }], 
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-    g_V_repeatXout_groupXaX_byXnameX_byXcountX_timesX2X_capXaX: [function({g}) { return g.V().repeat(__.out().group("a").by("name").by(__.count())).times(2).cap("a") }], 
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-    g_V_groupXaX_byXlabelX_byXoutE_weight_sumX_capXaX: [function({g}) { return g.V().group("a").by(T.label).by(__.outE().values("weight").sum()).cap("a") }], 
-    g_V_repeatXbothXfollowedByXX_timesX2X_group_byXsongTypeX_byXcountX: [function({g}) { return g.V().repeat(__.both("followedBy")).times(2).group().by("songType").by(__.count()) }], 
-    g_V_repeatXbothXfollowedByXX_timesX2X_groupXaX_byXsongTypeX_byXcountX_capXaX: [function({g}) { return g.V().repeat(__.both("followedBy")).times(2).group("a").by("songType").by(__.count()).cap("a") }], 
-    g_V_group_byXname_substring_1X_byXconstantX1XX: [function({g, l1}) { return g.V().group().by(l1).by(__.constant(1)) }], 
-    g_V_groupXaX_byXname_substring_1X_byXconstantX1XX_capXaX: [function({g, l1}) { return g.V().group("a").by(l1).by(__.constant(1)).cap("a") }], 
-    g_V_out_group_byXlabelX_selectXpersonX_unfold_outXcreatedX_name_limitX2X: [function({g}) { return g.V().out().group().by(T.label).select("person").unfold().out("created").values("name").limit(2) }], 
-    g_V_hasLabelXsongX_group_byXnameX_byXproperties_groupCount_byXlabelXX: [function({g}) { return g.V().hasLabel("song").group().by("name").by(__.properties().groupCount().by(T.label)) }], 
-    g_V_hasLabelXsongX_groupXaX_byXnameX_byXproperties_groupCount_byXlabelXX_out_capXaX: [function({g}) { return g.V().hasLabel("song").group("a").by("name").by(__.properties().groupCount().by(T.label)).out().cap("a") }], 
-    g_V_outXfollowedByX_group_byXsongTypeX_byXbothE_group_byXlabelX_byXweight_sumXX: [function({g}) { return g.V().out("followedBy").group().by("songType").by(__.bothE().group().by(T.label).by(__.values("weight").sum())) }], 
-    g_V_groupXmX_byXnameX_byXinXknowsX_nameX_capXmX: [function({g}) { return g.V().group("m").by("name").by(__.in_("knows").values("name")).cap("m") }], 
-    g_V_group_byXlabelX_byXbothE_groupXaX_byXlabelX_byXweight_sumX_weight_sumX: [function({g}) { return g.V().group().by(T.label).by(__.bothE().group("a").by(T.label).by(__.values("weight").sum()).values("weight").sum()) }], 
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-    g_V_hasLabelXpersonX_asXpX_outXcreatedX_group_byXnameX_byXselectXpX_valuesXageX_sumX: [function({g}) { return g.V().hasLabel("person").as("p").out("created").group().by("name").by(__.select("p").values("age").sum()) }], 
-    g_V_hasLabelXpersonX_asXpX_outXcreatedX_groupXaX_byXnameX_byXselectXpX_valuesXageX_sumX_capXaX: [function({g}) { return g.V().hasLabel("person").as("p").out("created").group("a").by("name").by(__.select("p").values("age").sum()).cap("a") }], 
-    g_V_group_byXlabelX_byXlabel_countX: [function({g}) { return g.V().group().by(__.label()).by(__.label().count()) }], 
-    g_V_groupXmX_byXlabelX_byXlabel_countX_capXmX: [function({g}) { return g.V().group("m").by(__.label()).by(__.label().count()).cap("m") }], 
-    g_V_outXcreatedX_groupCount_byXnameX: [function({g}) { return g.V().out("created").groupCount().by("name") }], 
-    g_V_groupCount_byXageX: [function({g}) { return g.V().groupCount().by("age") }], 
-    g_withStrategiesXProductiveByStrategyX_V_groupCount_byXageX: [function({g}) { return g.withStrategies(new ProductiveByStrategy({productiveKeys:[]})).V().groupCount().by("age") }], 
-    g_V_outXcreatedX_name_groupCount: [function({g}) { return g.V().out("created").values("name").groupCount() }], 
-    g_V_outXcreatedX_groupCountXaX_byXnameX_capXaX: [function({g}) { return g.V().out("created").groupCount("a").by("name").cap("a") }], 
-    g_V_outXcreatedX_name_groupCountXaX_capXaX: [function({g}) { return g.V().out("created").values("name").groupCount("a").cap("a") }], 
-    g_V_repeatXout_groupCountXaX_byXnameXX_timesX2X_capXaX: [function({g}) { return g.V().repeat(__.out().groupCount("a").by("name")).times(2).cap("a") }], 
-    g_V_both_groupCountXaX_byXlabelX_asXbX_barrier_whereXselectXaX_selectXsoftwareX_isXgtX2XXX_selectXbX_name: [function({g}) { return g.V().both().groupCount("a").by(T.label).as("b").barrier().where(__.select("a").select("software").is(P.gt(2))).select("b").values("name") }], 
-    g_V_unionXoutXknowsX__outXcreatedX_inXcreatedXX_groupCount_selectXvaluesX_unfold_sum: [function({g}) { return g.V().union(__.out("knows"),__.out("created").in_("created")).groupCount().select(Column.values).unfold().sum() }], 
-    g_V_hasXnoX_groupCount: [function({g}) { return g.V().has("no").groupCount() }], 
-    g_V_hasXnoX_groupCountXaX_capXaX: [function({g}) { return g.V().has("no").groupCount("a").cap("a") }], 
-    g_V_unionXrepeatXoutX_timesX2X_groupCountXmX_byXlangXX__repeatXinX_timesX2X_groupCountXmX_byXnameXX_capXmX: [function({g}) { return g.V().union(__.repeat(__.out()).times(2).groupCount("m").by("lang"),__.repeat(__.in_()).times(2).groupCount("m").by("name")).cap("m") }], 
-    g_V_outXcreatedX_groupCountXxX_capXxX: [function({g}) { return g.V().out("created").groupCount("x").cap("x") }], 
-    g_V_groupCount_byXbothE_countX: [function({g}) { return g.V().groupCount().by(__.bothE().count()) }], 
-    g_V_both_groupCountXaX_out_capXaX_selectXkeysX_unfold_both_groupCountXaX_capXaX: [function({g}) { return g.V().both().groupCount("a").out().cap("a").select(Column.keys).unfold().both().groupCount("a").cap("a") }], 
-    g_V_hasXperson_name_markoX_bothXknowsX_groupCount_byXvaluesXnameX_foldX: [function({g}) { return g.V().has("person","name","marko").both("knows").groupCount().by(__.values("name").fold()) }], 
-    g_VX1X_out_injectXv2X_name: [function({g, vid1, v2}) { return g.V(vid1).out().inject(v2).values("name") }], 
-    g_VX1X_out_name_injectXdanielX_asXaX_mapXlengthX_path: [function({g, l1, vid1}) { return g.V(vid1).out().values("name").inject("daniel").as("a").map(l1).path() }], 
-    g_VX1X_injectXg_VX4XX_out_name: [function({g, vid1, v4}) { return g.V(vid1).inject(v4).out().values("name") }], 
-    g_injectXnull_1_3_nullX: [function({g}) { return g.inject(null,1,3,null) }], 
-    g_injectX10_20_null_20_10_10X_groupCountXxX_dedup_asXyX_projectXa_bX_by_byXselectXxX_selectXselectXyXXX: [function({g}) { return g.inject(10,20,null,20,10,10).groupCount("x").dedup().as("y").project("a","b").by().by(__.select("x").select(__.select("y"))) }], 
-    g_injectXname_marko_age_nullX_selectXname_ageX: [function({g, xx1}) { return g.inject(xx1).select("name","age") }], 
-    g_injectXnull_nullX: [function({g}) { return g.inject(null,null) }], 
-    g_injectXnullX: [function({g}) { return g.inject(null) }], 
-    g_inject: [function({g}) { return g.inject() }], 
-    g_VX1X_valuesXageX_injectXnull_nullX: [function({g, xx1}) { return g.V(xx1).values("age").inject(null,null) }], 
-    g_VX1X_valuesXageX_injectXnullX: [function({g, xx1}) { return g.V(xx1).values("age").inject(null) }], 
-    g_VX1X_valuesXageX_inject: [function({g, xx1}) { return g.V(xx1).values("age").inject() }], 
-    g_injectXnull_1_3_nullX_asXaX_selectXaX: [function({g}) { return g.inject(null,1,3,null).as("a").select("a") }], 
-    g_io_readXkryoX: [function({g}) { return g.io("data/tinkerpop-modern.kryo").read() }, function({g}) { return g.V() }, function({g}) { return g.E() }], 
-    g_io_read_withXreader_gryoX: [function({g}) { return g.io("data/tinkerpop-modern.kryo").with_("~tinkerpop.io.reader","gryo").read() }, function({g}) { return g.V() }, function({g}) { return g.E() }], 
-    g_io_readXgraphsonX: [function({g}) { return g.io("data/tinkerpop-modern.json").read() }, function({g}) { return g.V() }, function({g}) { return g.E() }], 
-    g_io_read_withXreader_graphsonX: [function({g}) { return g.io("data/tinkerpop-modern.json").with_("~tinkerpop.io.reader","graphson").read() }, function({g}) { return g.V() }, function({g}) { return g.E() }], 
-    g_io_readXgraphmlX: [function({g}) { return g.io("data/tinkerpop-modern.xml").read() }, function({g}) { return g.V() }, function({g}) { return g.E() }], 
-    g_io_read_withXreader_graphmlX: [function({g}) { return g.io("data/tinkerpop-modern.xml").with_("~tinkerpop.io.reader","graphml").read() }, function({g}) { return g.V() }, function({g}) { return g.E() }], 
-    g_withSackXhelloX_V_outE_sackXassignX_byXlabelX_inV_sack: [function({g}) { return g.withSack("hello").V().outE().sack(Operator.assign).by(T.label).inV().sack() }], 
-    g_withSackX0X_V_outE_sackXsumX_byXweightX_inV_sack_sum: [function({g}) { return g.withSack(0.0).V().outE().sack(Operator.sum).by("weight").inV().sack().sum() }], 
-    g_withSackX0X_V_repeatXoutE_sackXsumX_byXweightX_inVX_timesX2X_sack: [function({g}) { return g.withSack(0.0).V().repeat(__.outE().sack(Operator.sum).by("weight").inV()).times(2).sack() }], 
-    g_withBulkXfalseX_withSackX1_sumX_VX1X_localXoutEXknowsX_barrierXnormSackX_inVX_inXknowsX_barrier_sack: [function({g, vid1}) { return g.withBulk(false).withSack(1.0,Operator.sum).V(vid1).local(__.outE("knows").barrier(Barrier.normSack).inV()).in_("knows").barrier().sack() }], 
-    g_withBulkXfalseX_withSackX1_sumX_V_out_barrier_sack: [function({g}) { return g.withBulk(false).withSack(1,Operator.sum).V().out().barrier().sack() }], 
-    g_withSackX1_sumX_VX1X_localXoutXknowsX_barrierXnormSackXX_inXknowsX_barrier_sack: [function({g, vid1}) { return g.withSack(1.0,Operator.sum).V(vid1).local(__.out("knows").barrier(Barrier.normSack)).in_("knows").barrier().sack() }], 
-    g_V_sackXassignX_byXageX_sack: [function({g}) { return g.V().sack(Operator.assign).by("age").sack() }], 
-    g_V_hasXageX_groupCountXaX_byXnameX_out_capXaX: [function({g}) { return g.V().has("age").groupCount("a").by("name").out().cap("a") }], 
-    g_V_storeXa_nameX_out_capXaX: [function({g}) { return g.V().store("a").by("name").out().cap("a") }], 
-    g_VX1X_storeXaX_byXnameX_out_storeXaX_byXnameX_name_capXaX: [function({g, vid1}) { return g.V(vid1).store("a").by("name").out().store("a").by("name").values("name").cap("a") }], 
-    g_withSideEffectXa_setX_V_both_name_storeXaX_capXaX: [function({g, xx1}) { return g.withSideEffect("a",xx1).V().both().values("name").store("a").cap("a") }], 
-    g_V_storeXaX_byXoutEXcreatedX_countX_out_out_storeXaX_byXinEXcreatedX_weight_sumX: [function({g}) { return g.V().store("a").by(__.outE("created").count()).out().out().store("a").by(__.inE("created").values("weight").sum()).cap("a") }], 
-}
-
-exports.gremlin = gremlins
+    g_injectX0X_mergeVXlabel_person_name_stephenX: [
\ No newline at end of file
diff --git a/gremlin-language/src/main/antlr4/Gremlin.g4 b/gremlin-language/src/main/antlr4/Gremlin.g4
index e285634..9021c36 100644
--- a/gremlin-language/src/main/antlr4/Gremlin.g4
+++ b/gremlin-language/src/main/antlr4/Gremlin.g4
@@ -97,6 +97,8 @@ traversalSourceSpawnMethod
 	| traversalSourceSpawnMethod_addV
 	| traversalSourceSpawnMethod_E
 	| traversalSourceSpawnMethod_V
+	| traversalSourceSpawnMethod_mergeE
+	| traversalSourceSpawnMethod_mergeV
 	| traversalSourceSpawnMethod_inject
     | traversalSourceSpawnMethod_io
     ;
@@ -128,6 +130,16 @@ traversalSourceSpawnMethod_io
     : 'io' LPAREN stringLiteral RPAREN
     ;
 
+traversalSourceSpawnMethod_mergeV
+    : 'mergeV' LPAREN genericLiteralMap RPAREN #traversalSourceSpawnMethod_mergeV_Map
+    | 'mergeV' LPAREN nestedTraversal RPAREN #traversalSourceSpawnMethod_mergeV_Traversal
+    ;
+
+traversalSourceSpawnMethod_mergeE
+    : 'mergeE' LPAREN genericLiteralMap RPAREN
+    | 'mergeE' LPAREN nestedTraversal RPAREN
+    ;
+
 chainedTraversal
     : traversalMethod
     | chainedTraversal DOT traversalMethod
@@ -157,6 +169,8 @@ traversalMethod
 	: traversalMethod_V
 	| traversalMethod_addE
 	| traversalMethod_addV
+	| traversalMethod_mergeE
+	| traversalMethod_mergeV
 	| traversalMethod_aggregate
 	| traversalMethod_and
 	| traversalMethod_as
@@ -272,6 +286,17 @@ traversalMethod_addV
 	| 'addV' LPAREN nestedTraversal RPAREN #traversalMethod_addV_Traversal
 	;
 
+traversalMethod_mergeV
+    : 'mergeV' LPAREN genericLiteralMap RPAREN #traversalMethod_mergeV_Map
+    | 'mergeV' LPAREN nestedTraversal RPAREN #traversalMethod_mergeV_Traversal
+    ;
+
+traversalMethod_mergeE
+    : 'mergeE' LPAREN genericLiteralMap RPAREN #traversalMethod_mergeE_Map
+    | 'mergeE' LPAREN nestedTraversal RPAREN #traversalMethod_mergeE_Traversal
+    ;
+
+
 traversalMethod_aggregate
 	: 'aggregate' LPAREN traversalScope COMMA stringLiteral RPAREN #traversalMethod_aggregate_Scope_String
 	| 'aggregate' LPAREN stringLiteral RPAREN #traversalMethod_aggregate_String
@@ -531,6 +556,8 @@ traversalMethod_not
 
 traversalMethod_option
 	: 'option' LPAREN traversalPredicate COMMA nestedTraversal RPAREN #traversalMethod_option_Predicate_Traversal
+	| 'option' LPAREN traversalMerge COMMA genericLiteralMap RPAREN #traversalMethod_option_Merge_Map
+	| 'option' LPAREN traversalMerge COMMA nestedTraversal RPAREN #traversalMethod_option_Merge_Traversal
 	| 'option' LPAREN genericLiteral COMMA nestedTraversal RPAREN #traversalMethod_option_Object_Traversal
 	| 'option' LPAREN nestedTraversal RPAREN #traversalMethod_option_Traversal
 	;
@@ -835,6 +862,11 @@ traversalToken
     | 'value' | 'T.value'
     ;
 
+traversalMerge
+    : 'onCreate' | 'Merge.onCreate'
+    | 'onMatch' | 'Merge.onMatch'
+    ;
+
 traversalOrder
     : 'incr' | 'Order.incr'
     | 'decr' | 'Order.decr'
diff --git a/gremlin-test/features/map/MergeVertex.feature b/gremlin-test/features/map/MergeVertex.feature
new file mode 100644
index 0000000..1f8ae9d
--- /dev/null
+++ b/gremlin-test/features/map/MergeVertex.feature
@@ -0,0 +1,265 @@
+# 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.
+
+@StepClassMap @StepMergeV
+Feature: Step - mergeV()
+
+  Scenario: g_mergeVXlabel_person_name_stephenX
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And the traversal of
+      """
+      g.mergeV(xx1)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\")"
+
+  Scenario: g_mergeVXlabel_person_name_markoX
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And the traversal of
+      """
+      g.mergeV(xx1)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\")"
+
+  Scenario: g_mergeVXlabel_person_name_stephenX_optionXonCreate_label_person_name_stephen_age_19X_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And using the parameter xx2 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\", \"age\": 19}]"
+    And the traversal of
+      """
+      g.mergeV(xx1).option(Merge.onCreate,xx2)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\").has(\"age\", 19)"
+
+  Scenario: g_mergeVXlabel_person_name_markoX_optionXonMatch_age_19X_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And using the parameter xx2 defined as "m[{\"age\": 19}]"
+    And the traversal of
+      """
+      g.mergeV(xx1).option(Merge.onMatch,xx2)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").has(\"age\", 19)"
+
+  Scenario: g_withSideEffectXc_label_person_name_stephenX_withSideEffectXm_label_person_name_stephen_age_19X_mergeVXselectXcXX_optionXonCreate_selectXmXX_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And using the parameter xx2 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\", \"age\": 19}]"
+    And the traversal of
+      """
+      g.withSideEffect("c", xx1).
+        withSideEffect("m", xx2).
+        mergeV(__.select("c")).option(Merge.onCreate, __.select("m"))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\").has(\"age\", 19)"
+
+  Scenario: g_withSideEffectXc_label_person_name_markoX_withSideEffectXm_age_19X_mergeVXselectXcXX_optionXonMatch_selectXmXX_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And using the parameter xx2 defined as "m[{\"age\": 19}]"
+    And the traversal of
+      """
+      g.withSideEffect("c", xx1).
+        withSideEffect("m", xx2).
+        mergeV(__.select("c")).option(Merge.onMatch, __.select("m"))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").has(\"age\", 19)"
+
+  @MultiMetaProperties
+  Scenario: g_mergeVXlabel_person_name_markoX_propertyXname_vadas_acl_publicX
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And the traversal of
+      """
+      g.mergeV(xx1).property("name","vadas","acl","public")
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().properties(\"name\").hasValue(\"vadas\").has(\"acl\",\"public\")"
+
+  Scenario: g_injectX0X_mergeVXlabel_person_name_stephenX
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And the traversal of
+      """
+      g.inject(0).mergeV(xx1)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\")"
+
+  Scenario: g_injectX0X_mergeVXlabel_person_name_markoX
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And the traversal of
+      """
+      g.inject(0).mergeV(xx1)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\")"
+
+  Scenario: g_injectX0X_mergeVXlabel_person_name_stephenX_optionXonCreate_label_person_name_stephen_age_19X_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And using the parameter xx2 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\", \"age\": 19}]"
+    And the traversal of
+      """
+      g.inject(0).mergeV(xx1).option(Merge.onCreate,xx2)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\").has(\"age\", 19)"
+
+  Scenario: g_injectX0X_mergeVXlabel_person_name_markoX_optionXonMatch_age_19X_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And using the parameter xx2 defined as "m[{\"age\": 19}]"
+    And the traversal of
+      """
+      g.inject(0).mergeV(xx1).option(Merge.onMatch,xx2)
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").has(\"age\", 19)"
+
+  Scenario: g_withSideEffectXc_label_person_name_stephenX_withSideEffectXm_label_person_name_stephen_age_19X_injectX0X_mergeVXselectXcXX_optionXonCreate_selectXmXX_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And using the parameter xx2 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\", \"age\": 19}]"
+    And the traversal of
+      """
+      g.withSideEffect("c", xx1).
+        withSideEffect("m", xx2).
+        inject(0).mergeV(__.select("c")).option(Merge.onCreate, __.select("m"))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\").has(\"age\", 19)"
+
+  Scenario: g_withSideEffectXc_label_person_name_markoX_withSideEffectXm_age_19X_injectX0X_mergeVXselectXcXX_optionXonMatch_selectXmXX_option
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And using the parameter xx2 defined as "m[{\"age\": 19}]"
+    And the traversal of
+      """
+      g.withSideEffect("c", xx1).
+        withSideEffect("m", xx2).
+        inject(0).mergeV(__.select("c")).option(Merge.onMatch, __.select("m"))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").has(\"age\", 19)"
+
+  @MultiMetaProperties
+  Scenario: g_injectX0X_mergeVXlabel_person_name_markoX_propertyXname_vadas_acl_publicX
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And the traversal of
+      """
+      g.inject(0).mergeV(xx1).property("name","vadas","acl","public")
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().properties(\"name\").hasValue(\"vadas\").has(\"acl\",\"public\")"
+
+  Scenario: g_injectXlabel_person_name_marko_label_person_name_stephenX_mergeVXidentityX
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko")
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And using the parameter xx2 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And the traversal of
+      """
+      g.inject(xx1, xx2).mergeV(__.identity())
+      """
+    When iterated to list
+    Then the result should have a count of 2
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\")"
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\")"
+    And the graph should return 2 for count of "g.V()"
diff --git a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/features/StepDefinition.java b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/features/StepDefinition.java
index e4d5e37..340d984 100644
--- a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/features/StepDefinition.java
+++ b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/features/StepDefinition.java
@@ -87,8 +87,11 @@ public final class StepDefinition {
     private static final Pattern ioPattern = Pattern.compile("g\\.io\\(\"(.*)\"\\).*");
     private List<Pair<Pattern, Function<String,String>>> stringMatcherConverters = new ArrayList<Pair<Pattern, Function<String,String>>>() {{
         // expects json so that should port to the Gremlin script form - replace curly json braces with square ones
-        // for Gremlin sake.
-        add(Pair.with(Pattern.compile("m\\[(.*)\\]"), s -> s.replace('{','[').replace('}', ']')));
+        // for Gremlin sake. allow for support of T as keys in maps, though this is starting to get a big ugly.
+        add(Pair.with(Pattern.compile("m\\[(.*)\\]"), s ->
+                s.replace("\"t[label]\"", "T.label").
+                        replace("\"t[id]\"", "T.id").
+                        replace('{','[').replace('}', ']')));
 
         add(Pair.with(Pattern.compile("l\\[\\]"), s -> "[]"));
         add(Pair.with(Pattern.compile("l\\[(.*)\\]"), s -> {
diff --git a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/ProcessLimitedStandardSuite.java b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/ProcessLimitedStandardSuite.java
index ddf3280..610ac7f 100644
--- a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/ProcessLimitedStandardSuite.java
+++ b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/ProcessLimitedStandardSuite.java
@@ -23,64 +23,11 @@ import org.apache.tinkerpop.gremlin.process.traversal.CoreTraversalTest;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalEngine;
 import org.apache.tinkerpop.gremlin.process.traversal.TraversalInterruptionTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.ComplexTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.branch.BranchTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.branch.ChooseTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.branch.LocalTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.branch.OptionalTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.branch.RepeatTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.branch.UnionTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.AndTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.CoinTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.CyclicPathTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.DedupTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.DropTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.FilterTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.HasTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.IsTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.OrTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.RangeTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.SampleTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.SimplePathTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.TailTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.filter.WhereTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.AddEdgeTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.AddVertexTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.CoalesceTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.ConstantTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.CountTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.ElementMapTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.FlatMapTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.FoldTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.GraphTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.IndexTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.LoopsTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.MapTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.MatchTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.MathTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.MaxTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.MeanTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.MinTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.OrderTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.PathTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.ProfileTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.ProjectTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.PropertiesTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.ReadTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.SelectTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.SumTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.UnfoldTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.ValueMapTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.map.VertexTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.map.WriteTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.AggregateTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.ExplainTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.GroupCountTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.GroupTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.InjectTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.SackTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.SideEffectCapTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.SideEffectTest;
-import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.StoreTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.SubgraphTest;
 import org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.TreeTest;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.ElementIdStrategyProcessTest;
@@ -92,8 +39,6 @@ import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.Transl
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization.EarlyLimitStrategyProcessTest;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization.IncidentToAdjacentStrategyProcessTest;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.ReadOnlyStrategyProcessTest;
-import org.apache.tinkerpop.gremlin.structure.Graph;
-import org.apache.tinkerpop.gremlin.structure.StructureStandardSuite;
 import org.junit.runners.model.InitializationError;
 import org.junit.runners.model.RunnerBuilder;
 
diff --git a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchTest.java b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchTest.java
index ed4b2e7..642cda4 100644
--- a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchTest.java
+++ b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/BranchTest.java
@@ -40,8 +40,8 @@ import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.identi
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.in;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.label;
 import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.values;
-import static org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick.any;
-import static org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick.none;
+import static org.apache.tinkerpop.gremlin.process.traversal.Pick.any;
+import static org.apache.tinkerpop.gremlin.process.traversal.Pick.none;
 
 /**
  * @author Marko A. Rodriguez (http://markorodriguez.com)
diff --git a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseTest.java b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseTest.java
index 28f3abe..d1f4933 100644
--- a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseTest.java
+++ b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/branch/ChooseTest.java
@@ -22,9 +22,9 @@ import org.apache.tinkerpop.gremlin.LoadGraphWith;
 import org.apache.tinkerpop.gremlin.process.AbstractGremlinProcessTest;
 import org.apache.tinkerpop.gremlin.process.GremlinProcessRunner;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.MapHelper;
 import org.apache.tinkerpop.gremlin.structure.Vertex;
 import org.junit.Test;
@@ -195,7 +195,7 @@ public abstract class ChooseTest extends AbstractGremlinProcessTest {
             return g.V().choose(label())
                     .option("blah", out("knows"))
                     .option("bleep", out("created"))
-                    .option(TraversalOptionParent.Pick.none, identity()).values("name");
+                    .option(Pick.none, identity()).values("name");
         }
 
         @Override
@@ -212,7 +212,7 @@ public abstract class ChooseTest extends AbstractGremlinProcessTest {
         public Traversal<Vertex, Map<String, Long>> get_g_V_hasLabelXpersonX_chooseXageX__optionX27L__constantXyoungXX_optionXnone__constantXoldXX_groupCount() {
             return g.V().hasLabel("person").choose(values("age"))
                     .option(27L, __.constant("young"))
-                    .option(TraversalOptionParent.Pick.none, __.constant("old"))
+                    .option(Pick.none, __.constant("old"))
                     .groupCount();
         }
 
diff --git a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/EventStrategyProcessTest.java b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/EventStrategyProcessTest.java
index 5aa9823..ed1e6a2 100644
--- a/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/EventStrategyProcessTest.java
+++ b/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/EventStrategyProcessTest.java
@@ -21,6 +21,7 @@ package org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration;
 import org.apache.tinkerpop.gremlin.FeatureRequirement;
 import org.apache.tinkerpop.gremlin.FeatureRequirementSet;
 import org.apache.tinkerpop.gremlin.process.AbstractGremlinProcessTest;
+import org.apache.tinkerpop.gremlin.process.traversal.Merge;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.MutationListener;
 import org.apache.tinkerpop.gremlin.structure.Edge;
@@ -40,7 +41,9 @@ import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils;
 import org.junit.Test;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicLong;
@@ -83,6 +86,31 @@ public class EventStrategyProcessTest extends AbstractGremlinProcessTest {
 
     @Test
     @FeatureRequirementSet(FeatureRequirementSet.Package.VERTICES_ONLY)
+    public void shouldTriggerAddVertexViaMergeV() {
+        final StubMutationListener listener1 = new StubMutationListener();
+        final StubMutationListener listener2 = new StubMutationListener();
+        final EventStrategy.Builder builder = EventStrategy.build()
+                .addListener(listener1)
+                .addListener(listener2);
+
+        if (graph.features().graph().supportsTransactions())
+            builder.eventQueue(new EventStrategy.TransactionalEventQueue(graph));
+
+        final EventStrategy eventStrategy = builder.create();
+
+        graph.addVertex("some", "thing");
+        final GraphTraversalSource gts = create(eventStrategy);
+        final Map<Object,Object> m = new HashMap<>();
+        m.put("any", "thing");
+        gts.V().mergeV(m).property("any", "thing").next();
+
+        tryCommit(graph, g -> assertEquals(1, IteratorUtils.count(gts.V().has("any", "thing"))));
+        assertEquals(1, listener1.addVertexEventRecorded());
+        assertEquals(1, listener2.addVertexEventRecorded());
+    }
+
+    @Test
+    @FeatureRequirementSet(FeatureRequirementSet.Package.VERTICES_ONLY)
     public void shouldTriggerAddVertexFromStart() {
         final StubMutationListener listener1 = new StubMutationListener();
         final StubMutationListener listener2 = new StubMutationListener();
@@ -246,6 +274,40 @@ public class EventStrategyProcessTest extends AbstractGremlinProcessTest {
 
     @Test
     @FeatureRequirementSet(FeatureRequirementSet.Package.VERTICES_ONLY)
+    public void shouldTriggerAddVertexPropertyChangedViaMergeV() {
+        final StubMutationListener listener1 = new StubMutationListener();
+        final StubMutationListener listener2 = new StubMutationListener();
+        final EventStrategy.Builder builder = EventStrategy.build()
+                .addListener(listener1)
+                .addListener(listener2);
+
+        if (graph.features().graph().supportsTransactions())
+            builder.eventQueue(new EventStrategy.TransactionalEventQueue(graph));
+
+        final EventStrategy eventStrategy = builder.create();
+
+        final Vertex vSome = graph.addVertex("some", "thing");
+        vSome.property(VertexProperty.Cardinality.single, "that", "thing");
+        final GraphTraversalSource gts = create(eventStrategy);
+
+        final Map<Object,Object> m1 = new HashMap<>();
+        m1.put("any", "thing");
+        gts.mergeV(m1).iterate();
+
+        final Map<Object,Object> m2 = new HashMap<>();
+        m2.put("any", "thing else");
+        gts.mergeV(m1).option(Merge.onMatch, m2).iterate();
+
+        tryCommit(graph, g -> assertEquals(1, IteratorUtils.count(gts.V().has("any", "thing else"))));
+
+        assertEquals(1, listener1.addVertexEventRecorded());
+        assertEquals(1, listener2.addVertexEventRecorded());
+        assertEquals(1, listener2.vertexPropertyChangedEventRecorded());
+        assertEquals(1, listener1.vertexPropertyChangedEventRecorded());
+    }
+
+    @Test
+    @FeatureRequirementSet(FeatureRequirementSet.Package.VERTICES_ONLY)
     @FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = Graph.Features.VertexFeatures.FEATURE_META_PROPERTIES)
     public void shouldTriggerAddVertexPropertyPropertyChanged() {
         final StubMutationListener listener1 = new StubMutationListener();
diff --git a/gremlin-tools/gremlin-io-test/src/main/java/org/apache/tinkerpop/gremlin/structure/io/Model.java b/gremlin-tools/gremlin-io-test/src/main/java/org/apache/tinkerpop/gremlin/structure/io/Model.java
index 62aad55..0926627 100644
--- a/gremlin-tools/gremlin-io-test/src/main/java/org/apache/tinkerpop/gremlin/structure/io/Model.java
+++ b/gremlin-tools/gremlin-io-test/src/main/java/org/apache/tinkerpop/gremlin/structure/io/Model.java
@@ -26,12 +26,12 @@ import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
 import org.apache.tinkerpop.gremlin.process.traversal.Operator;
 import org.apache.tinkerpop.gremlin.process.traversal.Order;
 import org.apache.tinkerpop.gremlin.process.traversal.P;
+import org.apache.tinkerpop.gremlin.process.traversal.Pick;
 import org.apache.tinkerpop.gremlin.process.traversal.Pop;
 import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions;
 import org.apache.tinkerpop.gremlin.process.traversal.Scope;
 import org.apache.tinkerpop.gremlin.process.traversal.TextP;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.BulkSet;
 import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalMetrics;
 import org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics;
@@ -178,7 +178,7 @@ public class Model {
         addGraphProcessEntry(Direction.OUT, "Direction", "", Compatibilities.UNTYPED_GRAPHSON.matchToArray());
         addGraphProcessEntry(Operator.sum, "Operator", "", Compatibilities.UNTYPED_GRAPHSON.matchToArray());
         addGraphProcessEntry(Order.shuffle, "Order", "", before3_5_0);
-        addGraphProcessEntry(TraversalOptionParent.Pick.any, "Pick", "", Compatibilities.UNTYPED_GRAPHSON.matchToArray());
+        addGraphProcessEntry(Pick.any, "Pick", "", Compatibilities.UNTYPED_GRAPHSON.matchToArray());
         addGraphProcessEntry(Pop.all, "Pop", "", Compatibilities.UNTYPED_GRAPHSON.matchToArray());
         addGraphProcessEntry(org.apache.tinkerpop.gremlin.util.function.Lambda.function("{ it.get() }"), "Lambda", "", Compatibilities.UNTYPED_GRAPHSON.matchToArray());
         final TraversalMetrics tm = createStaticTraversalMetrics();
diff --git a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_3/manual-graphson-generator.groovy b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_3/manual-graphson-generator.groovy
index 878f6a3..3806884 100644
--- a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_3/manual-graphson-generator.groovy
+++ b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_3/manual-graphson-generator.groovy
@@ -22,16 +22,13 @@ import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalMetri
 import org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics
 
 import java.time.*
-import java.nio.file.*
+
 import org.apache.tinkerpop.gremlin.driver.ser.*
 import org.apache.tinkerpop.gremlin.process.traversal.*
 import org.apache.tinkerpop.gremlin.tinkergraph.structure.*
 import org.apache.tinkerpop.gremlin.structure.*
 import org.apache.tinkerpop.gremlin.structure.io.graphson.*
 import org.apache.tinkerpop.gremlin.driver.message.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick
-import org.apache.tinkerpop.gremlin.structure.io.gryo.*
 import org.apache.commons.configuration.BaseConfiguration
 
 import java.util.concurrent.TimeUnit
diff --git a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_4/manual-graphson-generator.groovy b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_4/manual-graphson-generator.groovy
index e1ff14d..6b497b7 100644
--- a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_4/manual-graphson-generator.groovy
+++ b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/graphson/_3_2_4/manual-graphson-generator.groovy
@@ -22,16 +22,13 @@ import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalMetri
 import org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics
 
 import java.time.*
-import java.nio.file.*
+
 import org.apache.tinkerpop.gremlin.driver.ser.*
 import org.apache.tinkerpop.gremlin.process.traversal.*
 import org.apache.tinkerpop.gremlin.tinkergraph.structure.*
 import org.apache.tinkerpop.gremlin.structure.*
 import org.apache.tinkerpop.gremlin.structure.io.graphson.*
 import org.apache.tinkerpop.gremlin.driver.message.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick
-import org.apache.tinkerpop.gremlin.structure.io.gryo.*
 import org.apache.commons.configuration.BaseConfiguration
 
 import java.util.concurrent.TimeUnit
diff --git a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_3/manual-gryo-generator.groovy b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_3/manual-gryo-generator.groovy
index d231aa7..4f0dfac 100644
--- a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_3/manual-gryo-generator.groovy
+++ b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_3/manual-gryo-generator.groovy
@@ -21,19 +21,13 @@
 import org.apache.commons.configuration.BaseConfiguration
 import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalMetrics
 import org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics
-import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalMetrics
 import org.apache.tinkerpop.shaded.kryo.io.Output
 
 import java.time.*
-import java.nio.file.*
-import org.apache.tinkerpop.gremlin.driver.ser.*
+
 import org.apache.tinkerpop.gremlin.process.traversal.*
 import org.apache.tinkerpop.gremlin.tinkergraph.structure.*
 import org.apache.tinkerpop.gremlin.structure.*
-import org.apache.tinkerpop.gremlin.structure.io.graphson.*
-import org.apache.tinkerpop.gremlin.driver.message.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick
 import org.apache.tinkerpop.gremlin.structure.io.gryo.*
 
 import java.util.concurrent.TimeUnit
diff --git a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_4/manual-gryo-generator.groovy b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_4/manual-gryo-generator.groovy
index 6e66f36..d67eec4 100644
--- a/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_4/manual-gryo-generator.groovy
+++ b/gremlin-tools/gremlin-io-test/src/test/resources/org/apache/tinkerpop/gremlin/structure/io/gryo/_3_2_4/manual-gryo-generator.groovy
@@ -21,19 +21,13 @@
 import org.apache.commons.configuration.BaseConfiguration
 import org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversalMetrics
 import org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics
-import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalMetrics
 import org.apache.tinkerpop.shaded.kryo.io.Output
 
 import java.time.*
-import java.nio.file.*
-import org.apache.tinkerpop.gremlin.driver.ser.*
+
 import org.apache.tinkerpop.gremlin.process.traversal.*
 import org.apache.tinkerpop.gremlin.tinkergraph.structure.*
 import org.apache.tinkerpop.gremlin.structure.*
-import org.apache.tinkerpop.gremlin.structure.io.graphson.*
-import org.apache.tinkerpop.gremlin.driver.message.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.*
-import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent.Pick
 import org.apache.tinkerpop.gremlin.structure.io.gryo.*
 
 import java.util.concurrent.TimeUnit