Github user greghogan commented on the issue: https://github.com/apache/flink/pull/2564 Agreed, I would amend my earlier suggestion to say we only need to start with two projection methods (for each of top and bottom), something like `public Graph<TK, TVV, Tuple2<EV, EV>> topProjectionSimple() {` and `public Graph<TK, TVV, TopProjection<TVV, BK, BVV, EV>> topProjection() {` `TopProjection` (we can find better names) would be a `Tuple6` with POJO accessors as with `Vertex`, `Edge`, etc.
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