public void resetAll() {
   for (Iterator iter = trackers.values().iterator(); iter.hasNext(); ) {
     PerformanceTracker tracker = (PerformanceTracker) iter.next();
     tracker.reset();
   }
 }
 /**
  * Reset's the count and timers for the tracker with the given ID
  *
  * @param trackerID
  * @since 5.0
  */
 public void reset(String trackerID) {
   PerformanceTracker tracker = getTracker(trackerID);
   if (tracker != null) {
     tracker.reset();
   }
 }