idea: maybe heuristic based function/method signature

it's a bit common in old libraries.

like in flask

```py
def create_environ(*args: t.Any, **kwargs: t.Any) -> WSGIEnvironment:
```

this tells nothing, but

```py
    builder = EnvironBuilder(*args, **kwargs)

    try:
        return builder.get_environ()
    finally:
        builder.close()
```

The body shows all the signatures.
