Abacn commented on PR #35521:
URL: https://github.com/apache/beam/pull/35521#issuecomment-3474733787

   > I don't want this DoFn to generate any outputs" is expressed by returning 
None in process (either explicitly or implicitly).
   
   Now suppressed warning for the case of a bare `return`, and only issue 
warning for `return None`. Because `return None` is confusingly equivalent to 
`return` and won't emit "None" downstream


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