public boolean removeWebAppDebugModelListener(IWebAppDebugModelListener listener){
synchronized (privateInstanceLock) {
    return webAppDebugModelListeners.remove(listener);
  }
}

public boolean removeWebAppDebugModelListener ( IWebAppDebugModelListener listener ) { synchronized ( privateInstanceLock ) { return webAppDebugModelListeners . remove ( listener ) ; } }
remove a listener registered to receive notifications about model changes .
