question: @ Override public void rendererChanged ( RendererChangeEvent event ) { Plot parent = getParent ( ) ; if ( parent != null ) { if ( parent instanceof RendererChangeListener ) { RendererChangeListener rcl = ( RendererChangeListener ) parent ; rcl . rendererChanged ( event ) ; } else { throw new RuntimeException ( "The renderer has changed and I don't know what to do!" ) ; } } else { configureRangeAxes ( ) ; PlotChangeEvent e = new PlotChangeEvent ( this ) ; notifyListeners ( e ) ; } }
target:  Receives notification of a renderer change event.