def METHOD_NAME():
    stretch = SqrtStretch()
    values = stretch([-1.0, 0.0, 0.5, 1.0, 1.5])
    np.testing.assert_allclose(values, [0.0, 0.0, 0.70710678, 1.0, 1.0])
    values = stretch([-1.0, 0.0, 0.5, 1.0, 1.5], clip=False)
    np.testing.assert_allclose(values, [np.nan, 0.0, 0.70710678, 1.0, 1.2247448])