yanghua commented on issue #6367: [FLINK-9850] Add a string to the print method to identify output for DataStream URL: https://github.com/apache/flink/pull/6367#issuecomment-412144209 Hi @pnowojski thanks for your suggestion, I have refactored this PR, we both changed the `PrintSinkFunctionTest` so maybe I did not finish all of the works. What's more, I agree with the opinion about "deduplicate the logic of PrintSinkFunction and PrintingOutputFormat", I'd like to start this work, if current issue would be fixed.
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