what does async for do? or, how do async iterators in general work, because I’m pretty sure async for just helps you iterate on an async iterator.

I think async iterators have a method __anext__() which “steps through the iterable”? I don’t understand what stepping through means.

Also __anext__() returns an awaitable? what does that mean, especially if I have something like an AsyncIterator[Object], what does the awaitable have to do with the object?