Adding Mock to play-ws-standalone?

There’s been some discussion of adding a mock to play-ws-standalone:

This would be a distinct artifact that would be published alongside play-ws-standalone, and would be used in unit testing.

Well the question is, who will maintain it, will it have more maintainer if it is under the playframework github group?
I mean sure we should make such libraries more prominently appear in our docs, no matter on which github they live