I would like to be able to support functionality like what is available with theme blocks within my app blocks that I am developing, particularly the functionality to compose app blocks with other blocks in a theme. It would be great if I could specify something like "blocks": [{"type": "@theme"}] inside of my schema for an app block.
Is this kind of functionality possible or if not currently possible is this on a roadmap for near term release?
See here for reference: Block schema