Major Description
g.V().project("a", "b", "b").by("lang").by(T.id).by("age")
TP:
1 {'b': 29}
2 {'b': 27}
3 {'a': 'java', 'b': '3'}
4 {'b': 32}
5 {'a': 'java', 'b': '5'}
6 {'b': 35}
TinkerPop erroneously generates an output from the final 'productive' by-traversal when a key is used more than once, a situation that should not occur. A proposed solution is to throw an exception when a redundant key is detected.