* Returns the GraphicsNodeRable for this node.
* The GraphicsNodeRable is the Renderable (Filter) before any
* of the filter operations have been applied.
*/
public GraphicsNodeRable getGraphicsNodeRable() {
GraphicsNodeRable ret = null;
if (graphicsNodeRable != null) {
ret = (GraphicsNodeRable)graphicsNodeRable.get();
if (ret != null) return ret;
}
ret = new GraphicsNodeRable8Bit(this);