Github user okram commented on the issue:
https://github.com/apache/tinkerpop/pull/499
No GraphSON will change in this branch but we will solve TINKERPOP-1562 in
the same release as this branch. Thus, this branch is like a "half-ticket" with
TINKERPOP-1562's completion being the finale. Note that I also targeted this
branch to `master/` so we can have breaking changes to GraphSON 2.0 for
TinkerPop 3.3.0.
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