Collections can declared that they support configuration entities however config entity storage is completely unaware of collections. Collections are only used to store config override information by core. I think we should simplify code by removing the ability to support loading and creating config entities in collections.
Beta phase evaluation
|Issue category||Bug because config entity storage is unaware of collections - thereby breaking static caching|
|Issue priority||Normal because the functionality is currently unused and untested - which is another good reason to remove.|