@Override
 public String getName() {
   if (currentBookmark != null) {
     return currentBookmark.getName();
   }
   return null;
 }
 /** @param currentBookmark the currentBookmark to set */
 public void setCurrentBookmark(IBookmark bookmark) {
   if (!bookmark.equals(currentBookmark)) {
     currentBookmark = bookmark;
     // notify everything that is listening for a strategy change
     this.notifyListeners(new BoundaryListener.Event(this));
   }
 }
 @Override
 public ReferencedEnvelope getExtent() {
   if (currentBookmark != null) {
     return currentBookmark.getEnvelope();
   }
   return null;
 }