1958             self.assertEqual(x._proto, None)
1960             self.assertEqual(x._proto, proto)
1962             self.assertEqual(y._proto, None)
1967             self.assertEqual(x._proto, None)
1969             self.assertEqual(x._proto, proto)
1971             self.assertEqual(y._proto, None)
1976             self.assertEqual(x._proto, None)
1978             self.assertEqual(x._proto, proto)
1980             self.assertEqual(y._proto, proto)
2594     _proto = None  variable in REX_two
2596         self._proto = proto
2600     _proto = None  variable in REX_three
2602         self._proto = proto
2609     _proto = None  variable in REX_four
2611         self._proto = proto