Github user fhueske commented on the pull request: https://github.com/apache/flink/pull/1205#issuecomment-145921072 Hi, you might have noticed, I got a bit confused about the `vertexValue` parameter and how it affects the graph creation. I made a proposal inline to rename that parameter and making it mandatory. Let me know what you think. The documentation should discuss the `vertexValue` in more detail. Otherwise the PR looks good.
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