[jira] [Created] (FLINK-8292) Remove unnecessary force cast in DataStreamSource

[Shang Yuanchun (Jira)]

Matrix42 created FLINK-8292:
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             Summary: Remove unnecessary force cast in DataStreamSource
                 Key: FLINK-8292
                 URL: https://issues.apache.org/jira/browse/FLINK-8292
             Project: Flink
          Issue Type: Improvement
          Components: DataStream API
            Reporter: Matrix42
            Priority: Trivial


In DataStreamSource there is a cast can be replaced by retuen `this`



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