def METHOD_NAME():
    """Test that we can unlink a single layer from all others."""
    l1 = layers.Points(None)
    l2 = layers.Points(None)
    l3 = layers.Points(None)
    link_layers([l1, l2, l3])
    assert len(l1.events.opacity.callbacks) == 2
    unlink_layers([l1], ('opacity',))  # just unlink L1 opacicity from others
    assert len(l1.events.opacity.callbacks) == 0
    assert len(l2.events.opacity.callbacks) == 1
    assert len(l3.events.opacity.callbacks) == 1
    # blending was untouched
    assert len(l1.events.blending.callbacks) == 2
    assert len(l2.events.blending.callbacks) == 2
    assert len(l3.events.blending.callbacks) == 2
    unlink_layers([l1])  # completely unlink L1 from everything
    assert not l1.events.blending.callbacks