/** utility method to reveal all positions in a track */
 @FireReformatted
 public void revealAllPositions() {
   final Enumeration<Editable> theEnum = elements();
   while (theEnum.hasMoreElements()) {
     final TrackSegment seg = (TrackSegment) theEnum.nextElement();
     final Enumeration<Editable> ele = seg.elements();
     while (ele.hasMoreElements()) {
       final Editable editable = ele.nextElement();
       final FixWrapper fix = (FixWrapper) editable;
       fix.setVisible(true);
     }
   }
 }