Github user fhueske commented on the pull request:
https://github.com/apache/flink/pull/966#issuecomment-130319656
To keep it consistent with the remaining API. For functions you need to
extend a RichFunction if you want to have access to the RuntimeContext. I agree
that the name is not perfect (and I think everybody else got your point as
well) but I think it's a valid point to aim for consistency.
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