def METHOD_NAME():
    w = wcs.WCS(naxis=3)
    w.pixel_shape = [100, 200, 300]
    w.pixel_bounds = ((11, 22), (33, 45), (55, 67))
    w.extra = 111
    w2 = pickle.loads(pickle.dumps(w))
    # explicitly test naxis-related info
    assert w.naxis == w2.naxis
    assert w.pixel_shape == w2.pixel_shape
    assert w.pixel_bounds == w2.pixel_bounds
    # test all attributes
    for k, v in w.__dict__.items():
        assert getattr(w2, k) == v