Scott Wegner created BEAM-249:
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Summary: Combine.GroupedValues re-wraps combineFn from
Combine.PerKey and loses identity for DisplayData
Key: BEAM-249
URL: https://issues.apache.org/jira/browse/BEAM-249
Project: Beam
Issue Type: Sub-task
Components: sdk-java-core
Reporter: Scott Wegner
Assignee: Davor Bonaci
Priority: Minor
Combine.PerKey is implemented in terms of Combine.GroupedValues, but it passed
as wrapped combineFn which gets re-wrapped in Combine.GroupedValues. As a
result, we lose the identity of the original combineFn for display data.
We should update the API to also pass the original identity downstream.
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