def METHOD_NAME(self) -> None:
    f1 = FrameGO(index=range(5))
    f1.via_fill_value(0)['a'] = Series([10,20], index=(2,4))
    f1.via_fill_value(-1)['b'] = Series([10,20], index=(0,1))
    self.assertEqual(f1.to_pairs(),
            (('a', ((0, 0), (1, 0), (2, 10), (3, 0), (4, 20))), ('b', ((0, 10), (1, 20), (2, -1), (3, -1), (4, -1))))
            )
    f2 = Frame(index=range(5))
    with self.assertRaises(TypeError):
        f2.via_fill_value(0)['a'] = range(5) # type: ignore #pylint: disable=E1137