Github user aljoscha commented on the issue: https://github.com/apache/flink/pull/3438 I think the discussion of timestamps and additional interfaces is orthogonal to this PR: `KeyedProcessOperator` is a renaming of the pre-existing `ProcessOperator` and the new `ProcessOperator` is a simplification that does away with timers. The interface for timestamps exists in the current code base, if we want to change that we should open other Jira issues.
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