def test_bool(self):
        prio_set_list = event._PrioritizedSetList()

        assert bool(prio_set_list) is False

        prio_set_list.add(0, None)
        assert bool(prio_set_list) is True
def process_update_types(self) -> list:
        """
        You need to override this method and return any update types which you want to be processed
        """
        raise NotImplementedError