def METHOD_NAME(function: Callable) -> str:
    """Given a function, calculate its identifier.
    A identifier is a string in the format ``<module name>:<function name>``,
    similarly to the convention used for setuptools entry points.
    Note:
        This function does not return a Python 3 ``__qualname__`` equivalent.
        If the function is nested inside another function or class, the parent
        name is ignored.
    Args:
        function (callable): function object
    """
    return f"{function.__module__}:{function.__name__}"