def test_initializedOnce(self):
        first = self.FXF._enumerants
        self.FXF.READ # Side-effects!
        second = self.FXF._enumerants
        self.assertIdentical(first, second)
L{Flags._enumerants} is initialized once and its value re-used on
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/test/test_constants.py/FlagsTests.test_initializedOnce