Github user vasia commented on the pull request:
https://github.com/apache/flink/pull/1900#issuecomment-215012658
How about we add the translate methods to the `Graph` class and implement
translators as `MapFunction<Old, New>`? This way they can be used even if don't
have a graph but a dataset of vertices or edges. There is no requirement to
have the mappers operate on the vertex and edge level.
Does this sound like a good idea?
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