Asynchronous function decorator, within a class.

[mplatypus]

The title might be a bit confusing, but I do have two kinds of questions here (feel free to let me know if they should be separate)

Basically, my first question is, how can I make an async function decorator, and type it appropriately?

@some_decorator()
async def some_function() -> None:
    pass

Then, the second question is, how can I then take that (or just do the following)

some_parent = SomeParent()

@some_parent.some_decorator()
async def some_function() -> None:
    pass

(Would also be curious for that second half, what that would look like in terms of a non-async version.)