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https://issues.apache.org/jira/browse/BEAM-2938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16862298#comment-16862298
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Luke Cwik commented on BEAM-2938:
---------------------------------
Its vague as to whether this is combiner lifting for merging windows which is
not supported anywhere to my knowledge or if its just combiner lifting. The
latter is done. I'm going to close as obsolete.
> Fn API combiner support w/ lifting to GABW
> ------------------------------------------
>
> Key: BEAM-2938
> URL: https://issues.apache.org/jira/browse/BEAM-2938
> Project: Beam
> Issue Type: Improvement
> Components: beam-model
> Reporter: Henning Rohde
> Priority: Major
> Labels: portability
>
> The FnAPI should support this optimization. Detailed design TBD.
> Once design is ready, expand subtasks similarly to BEAM-2822.
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