/**
  * @return Returns <code>true</code> if we show the arrows when both association ends of an
  *     association are navigable.
  */
 public boolean isShowBidirectionalArrows() {
   if (showBidirectionalArrows == null) {
     if (parent != null) {
       return parent.isShowBidirectionalArrows();
     } else {
       return false;
     }
   }
   return showBidirectionalArrows;
 }