/** Will decorate the element with the bookmark icon */
 public void decorate(Object element, IDecoration decoration) {
   if (hasBookmark(element)) {
     decoration.addOverlay(ImageDescription.getBookmarkDescriptor());
   }
 }
 // @Override
 public ImageDescriptor[] getCreateImageDescriptor() {
   return new ImageDescriptor[] {ImageDescription.getSequenceDescriptor()};
 }