def test_type(self):
        rset = event.ResultSet()
        with pytest.raises(NotImplementedError):
            rset.extend([])
        with pytest.raises(NotImplementedError):
            rset.extend(False)
def __init__(self, root_path: str, defaults: t.Optional[dict] = None) -> None:
        dict.__init__(self, defaults or {})
        self.root_path = root_path