def _invariant_check(self, _):
    for e in self.mcs:
      if self.new_dag._events_set not in e:
        return []
    return ["violation"]
dataset/ETHPy150Open ucb-sts/sts/tests/unit/sts/mcs_finder_test.py/MockMCSFinderBase._invariant_check/swapped operands of `not in`