/** Stops the synchronization. */
 public void stop() {
   job.cancel();
   IInterpreterManager[] managers = PydevPlugin.getAllInterpreterManagers();
   synchronized (lockSetInfos) {
     for (IInterpreterManager iInterpreterManager : managers) {
       if (iInterpreterManager != null) {
         stopTrack(iInterpreterManager, pathWatch);
       }
     }
   }
   pathWatch.dispose();
 }