Github user spmallette commented on the pull request:
https://github.com/apache/incubator-tinkerpop/pull/48#issuecomment-90703991
Use of `<optional>` is interesting here. `TinkerGraph` only depends on
`gremlin-groovy` because of the plugin infrastructure. In the case where
`TinkerGraph` is used as a plugin, it would be expected that `gremlin-groovy`
would be provided by the infrastructure that was hosting it (i.e
`gremlin-console` and `gremlin-server`).
In that sense, would `provided` scope be better for `gremlin-groovy`?
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