public bool RemoveActorLoadedListener(ActorLoadedCallback callback, object userData)
    {
        ActorLoadedListener item = new ActorLoadedListener();

        item.SetCallback(callback);
        item.SetUserData(userData);
        return(this.m_loadedListeners.Remove(item));
    }
    public void AddActorLoadedListener(ActorLoadedCallback callback, object userData)
    {
        ActorLoadedListener item = new ActorLoadedListener();

        item.SetCallback(callback);
        item.SetUserData(userData);
        if (!this.m_loadedListeners.Contains(item))
        {
            this.m_loadedListeners.Add(item);
        }
    }