[beam] branch master updated (0690ec2 -> b09543e)

[ro...@apache.org]

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robertwb pushed a change to branch master
in repository https://gitbox.apache.org/repos/asf/beam.git.


    from 0690ec2  Merge pull request #13260: [BEAM-11192] Replace Java FnApi test tasks with Runner V2.
     new 538179b  Account for overheads for small/empty PCollections.
     new 1bd3133  Actually flush batches in rebatch.
     new b09543e  Merge pull request #13314 from robertwb/dataframe-rebatch

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Summary of changes:
 sdks/python/apache_beam/dataframe/transforms.py    |  7 +++--
 .../apache_beam/dataframe/transforms_test.py       | 32 ++++++++++++++++++++++
 2 files changed, 37 insertions(+), 2 deletions(-)