def test_passed_starStar(self):
        """
        Additional keyword arguments are passed as a dict to the star star
        keyword argument.
        """
        def func(a, **b):
            pass
        self.assertEqual(self.checkPassed(func, 1, x=2, y=3, z=4),
                         dict(a=1, b=dict(x=2, y=3, z=4)))

        Additional keyword arguments are passed as a dict to the star star
        keyword argument.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_deprecate.py