from typing import reveal_type


class Foo:
    def bar(self, simple_union: int | str, complex_union: int | str | tuple[int, str] | None = None): ...


class FooManager:
    def __init__(self):
        self.foo = Foo()

    @property
    def bar(self):
        return self.foo.bar


reveal_type(FooManager().bar)  # revealed type: (self: Foo, simple_union: int | str, complex_union: Unknown = None) -> None