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 _setup_item_button(self, item_button, icon, position=None):
    item_button.set_relief(gtk.RELIEF_NONE)