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https://issues.apache.org/jira/browse/FLINK-4997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15868184#comment-15868184
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ASF GitHub Bot commented on FLINK-4997:
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Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/3285
@VenturaDelMonte I opened this:
https://issues.apache.org/jira/browse/FLINK-5740. I want to make
`WrappingFunction` an interface because, as you noted,
`RichProcessWindowFunction` does currently not work.
I would merge this then. If you want you can pick up the work on the
all-window case again and carry it to an end in the same way. What do you think?
> Extending Window Function Metadata
> ----------------------------------
>
> Key: FLINK-4997
> URL: https://issues.apache.org/jira/browse/FLINK-4997
> Project: Flink
> Issue Type: New Feature
> Components: DataStream API, Streaming
> Reporter: Ventura Del Monte
> Assignee: Ventura Del Monte
>
> https://cwiki.apache.org/confluence/display/FLINK/FLIP-2+Extending+Window+Function+Metadata
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