EmbeddedRecordsMixin as public API?

Are there plans for the EmbeddedRecordsMixin to be a public API? I just upgraded to 2.3 and am loving the module imports but was disappointed to see the EmbeddedRecordsMixin was not part of the public API.

Thanks for all the effort going into ED!

Found an issue for this: https://github.com/emberjs/data/pull/4125