Behavior with async methods?

[BatmanAoD]

What is the expected behavior when wrapping an async method with @retry? I see that there's a separate library for retrying an async method, so presumably this non-async version won't work as expected; but is it effectively doing "nothing", or something else? (I've seen async functions decorated with @retry from this library, so I know that it doesn't throw a TypeError or anything like that.)