basedmypy doesnt understand that overloads are named

```py
from typing import overload

class Foo:
@overload
def f(self, x: int): ...
@overload
def f(self, x: str): ...
def f(self, x: object): ...

Foo().f.__name__
```

Start by running the provided Python snippet through basedmypy and capture the diagnostic for Foo().f.__name__. Trace the handling of overloaded methods from that entry point; the issue is done when the checker correctly understands the overloaded method's name without reporting the demonstrated problem.

Written by the indexing model from the issue text.