def METHOD_NAME():
    cmap = CategoricalColormap()
    assert cmap.colormap == {}
    color_cycle = cmap.fallback_color
    np.testing.assert_almost_equal(color_cycle.values, [[1, 1, 1, 1]])
    np.testing.assert_almost_equal(next(color_cycle.cycle), [1, 1, 1, 1])