Github user ssaumitra commented on the pull request: https://github.com/apache/flink/pull/1250#issuecomment-147179239 In my opinion, if we provide TriangleEnumerator as a library function, TriangleCounter would be trivial extension to it. So would it be required to add it in library? Also if we want to expose triangle enumerator, I think we need to make Triad as a part of library too (right now it's private class)
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