public LayerGraphicWarehouseSupport(){
  initDrawingAttributes();
  graphics=new OMGraphicList();
  graphics.setTraverseMode(OMGraphicList.LAST_ADDED_ON_TOP);
}

public LayerGraphicWarehouseSupport ( ) { initDrawingAttributes ( ) ; graphics = new OMGraphicList ( ) ; graphics . setTraverseMode ( OMGraphicList . LAST_ADDED_ON_TOP ) ; }
construct an object , initializes graphiclist
