def METHOD_NAME(self):
    so = copy.deepcopy(self.sting_obj)
    assert np.allclose(so.guefus, [4, 5, 2])
    so.guefus = np.random.randint(0, 4, 3)
    ts = so.to_pandas()
    new_so = DummyStingrayObj.from_pandas(ts)
    _check_equal(so, new_so)