Hequn Cheng created FLINK-9850:
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Summary: Add a string to the print method to identify output for DataStream
Key: FLINK-9850
URL: https://issues.apache.org/jira/browse/FLINK-9850
Project: Flink
Issue Type: New Feature
Components: DataStream API
Reporter: Hequn Cheng
The output of the print method of {[DataSet}} allows the user to supply a String to identify
the output(see [FLINK-1486|https://issues.apache.org/jira/browse/FLINK-1486]). But {[DataStream}}
doesn't support now. It is valuable to add this feature for {{DataStream}}
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