Python Callback Type Annotation

callback.py

def fn(
    url: str,
    state: State,
    payload_type: PayloadType,
    verify: bool = True,
    method: Callable[..., Response] = requests.post,
) -> None:
    """
    Given a function with the above signature, how can the type of
    ``method`` be made more specific?
    """

    # stuff...

    response = method(
        url,
        verify=verify,
        **{payload_type.name.lower(): {'state': state.name.upper()}}
    )

    # more stuff...