def test_contains(self):
        prio_set_list = event._PrioritizedSetList()
        obj = object()

        prio_set_list.add(0, obj)
        assert obj in prio_set_list
def __init__(self, masked_tokens=None, name='accuracy', dtype=None):
    self._masked_tokens = masked_tokens or []
    super().__init__(name, dtype=dtype)