IMySolarPanel Missing? [Solved]

Back again, just updating my scripts .... seems IMySolarPanel isn't there anymore? Am I mistaken or is there interface to use?

EDIT: In Development branch.
--- Automerge ---
Seems to work in game, but not recognised in VS, but everything seems to be.

FIXED: Added new reference:
using SpaceEngineers.Game.ModAPI.Ingame;