def METHOD_NAME():
    x, y = np.array([1, 0]), np.array([0, 1])
    e1 = 0.1
    e2 = 0
    center_x, center_y = 0, 0
    x_, y_ = param_util.transform_e1e2_square_average(
        x, y, e1, e2, center_x=center_x, center_y=center_y
    )
    npt.assert_almost_equal(
        np.sum(x**2 + y**2), np.sum(x_**2 + y_**2), decimal=8
    )