Register the given extension method as a public attribute of the given base.

    README: The expected protocol here is that the given extension method is an unbound function.
    It will be bound to the specified base as a method, and then set as a public attribute of that
    base.

def register_extension_method(ext, base, *args, **kwargs):
    """Register the given extension method as a public attribute of the given base.

    README: The expected protocol here is that the given extension method is an unbound function.
    It will be bound to the specified base as a method, and then set as a public attribute of that
    base.
    """
    bound_method = create_bound_method(ext.plugin, base)
    setattr(base, ext.name.lstrip('_'), bound_method)