def test_multipleMethods(self):
        """
        [Regression test] The proxy should send its method calls to the correct
        method, not the incorrect one.
        """
        multi = MultipleMethodImplementor()
        proxy = proxyForInterface(IMultipleMethods)(multi)
        self.assertEqual(proxy.methodOne(), 1)
        self.assertEqual(proxy.methodTwo(), 2)

        [Regression test] The proxy should send its method calls to the correct
        method, not the incorrect one.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_components.py