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 orchestrator(self):
        """
        :returns: Orchestrator instance.
        :rtype: Orchestrator
        """
        return self.__orchestrator