def METHOD_NAME(self):
    func = self.SPEMD.is_not_empty
    assert func(0.1, 0.2)
    assert func([0.1], [0.2])
    assert func((0.1, 0.3), (0.2, 0.4))
    assert func(np.array([0.1]), np.array([0.2]))
    assert not func([], [])
    assert not func(np.array([]), np.array([]))