Adding background collections in UPBGE 0.3?

I want to add a background collection to a scene in UPBGE. It is a skydome. The problem is that there is no addBackgroundCollection() equivalent of addOverlayCollection(), and neither is there an Add Background Collection mode in the Collection Actuator. In 2.79/0.2x, there were Background Scenes that could do this. Background Collections are useful for skydomes, but there doesn’t appear to be any support for it, which kinda surprises me. Can anyone find a solution to this please?