The commons-lang dependency is for 2.x and its last release goes back to 2011. I think our code references some of its classes, mostly because the IDE defaulted it that way on auto-import. Unfortunately, we can't lift it out completely without bumping commons-configuration which still depends on 2.x and that can't be done without a breaking change. I imagine we should consider that for TinkerPop 3.5.x and deprecate the use of that module in favor of the new Configuration 2.x, but I think that's for a different day. Looked into it a bit and it was a small mess.