@withActionContext
    def test_addBothReturnsSelf(self):
        result = Deferred()
        context = DeferredContext(result)
        self.assertIs(context, context.addBoth(lambda x: None))
Remove all case values from this CaseSet but leave list of
dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_twisted.py/DeferredContextTests.test_addBothReturnsSelf--crossover with--dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.lib/src/openmdao/lib/casehandlers/caseset.py/CaseSet.clear