Github user spmallette commented on the issue:
https://github.com/apache/tinkerpop/pull/788
sorry, it too me a while to get to this. It looks like you have a good unit
tests for `SparkMessenger` but is there an integration test that would also
work so that it could be added to the general test suite. In this way we could
see it executed against `TinkerMessenger` and potentially other places where an
edgeFunction might be in use?---
