def test_type(self):
        rset = event.ResultSet()
        with pytest.raises(NotImplementedError):
            rset.extend([])
        with pytest.raises(NotImplementedError):
            rset.extend(False)
def __init__(self, name: str, get_converter: t.Optional[t.Callable] = None) -> None:
        self.__name__ = name
        self.get_converter = get_converter