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
Now that ClutterActor has a default paint volume, subclasses may wish to retrieve it without chaining up to the parent's implementation of the get_paint_volume() function. The get_default_paint_volume() returns a ClutterPaintVolume pointer to the paint volume as computed by the default implementation of the get_paint_volume() virtual function; it can only be used immediately, as it's not guaranteed to survive across multiple frames.