Async/Promise before/after filters do not work as advertised in the README
Sorry about the inconvenience, was focusing on LayoutManager 0.8 release and ignored my other projects. I'm most likely removing async/deferred functionality.
No worries. I can do the work to add async filters if its just a question of you having time. If you'd prefer to remove async filters in general, I'd be curious to know why you don't think their required.
Is this project still in active development?