/** Removes this model as listener from global event sources like {@link DatasetEventManager} */
 public void unregisterAsEventListener() {
   DatasetEventManager.getInstance().removeDatasetListener(this);
 }
 /** Registers this model with global event sources like {@link DatasetEventManager} */
 public void registerAsEventListener() {
   DatasetEventManager.getInstance().addDatasetListener(this, FireMode.IN_EDT);
 }