Github user spmallette commented on the issue:
https://github.com/apache/tinkerpop/pull/705
`clone()` won't work well for all graphs though. Making it a generalized
utility for `clone()` just seems to invite more trouble than having it just
available to TinkerGraph where it at least makes some sense. Cloning a
JanusGraph or DseGraph instance, - weird - but `clone()` a small in-memory
TinkerGraph - makes more sense.
Any reason you think that `clone()` on TinkerGraph is different from a
TinkerGraph specific method like `clear()`?
---
