question: protected void drawRangeMarkers ( Graphics2D g2 , Rectangle2D dataArea , int index , Layer layer ) { CategoryItemRenderer r = getRenderer ( index ) ; if ( r == null ) { return ; } Collection markers = getRangeMarkers ( index , layer ) ; ValueAxis axis = getRangeAxisForDataset ( index ) ; if ( markers != null && axis != null ) { Iterator iterator = markers . iterator ( ) ; while ( iterator . hasNext ( ) ) { Marker marker = ( Marker ) iterator . next ( ) ; r . drawRangeMarker ( g2 , this , axis , marker , dataArea ) ; } } }
target:  Draws the range markers (if any) for an axis and layer.  This method is typically called from within the draw() method.