def __call__(self, thunk):
        unit = FakeDelayedCall(thunk)
        self.work.append(unit)
        return unit
Enable the Undo/Redo mechanism.
dataset/ETHPy150Open twisted/twisted/twisted/test/test_cooperator.py/FakeScheduler.__call__--crossover with--dataset/ETHPy150Open PyTables/PyTables/tables/file.py/File.enable_undo