Ok, so then the problem statement is how to do dependency injection of lifecycle references into closures. This is specific and asking quite a lot of a single e

Ok, so then the problem statement is how to do dependency injection of lifecycle references into closures. This is specific and asking quite a lot of a single entrypoint function. The closure 'at some point' (either at the end, or coordinated give then get calls) would have to transfer ownership. At this point you'd likely be better off making an interface and not a single entry/exit closure.