def METHOD_NAME(self) -> None:
    f1 = Frame(np.arange(20).reshape(4, 5), index=tuple('abcd'))
    f2 = f1.via_T.via_fill_value(0) * Series((0, 2), index=tuple('bc'))
    self.assertEqual(f2.to_pairs(),
            ((0, (('a', 0), ('b', 0), ('c', 20), ('d', 0))), (1, (('a', 0), ('b', 0), ('c', 22), ('d', 0))), (2, (('a', 0), ('b', 0), ('c', 24), ('d', 0))), (3, (('a', 0), ('b', 0), ('c', 26), ('d', 0))), (4, (('a', 0), ('b', 0), ('c', 28), ('d', 0)))))