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 set_values(self, values):
    self._locker.lock("emit_size_spin_button_value_changed")
    self._locker.lock("prevent_removal_below_min_size")