Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/1752#issuecomment-199727597
Hmm but if it is nowhere implemented then we could directly remove
`ProgramDescription`. I mean why keeping code in the base which is not used?
Furthermore, I don't think that it would harm if people implemented this
interface. And if they look in the code, then they will also see that it's
highly optional.
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