private void registerChildListeners(){
  Iterator<PropertyChangeListener> iter=fChildListeners.iterator();
  while (iter.hasNext()) {
    PropertyChangeListener listener=iter.next();
    listener.register();
  }
}

private void registerChildListeners ( ) { Iterator < PropertyChangeListener > iter = fChildListeners . iterator ( ) ; while ( iter . hasNext ( ) ) { PropertyChangeListener listener = iter . next ( ) ; listener . register ( ) ; } }
register the child listeners on the child preference stores .
