Hello I have a function that can return either an empty set {} or a set of strings: {'string1', 'string2'}. How would I type hint this?

I can use set[str] but does it allow an empty set?

Similarly, what would be the type hint for a function that can return either an empty dict or a dict with strings as keys and bool or string as values?

Does dict[str, str|bool] allow empty dicts?