public static void ListenOnceForOne(this IEventDispatcher dispatcher, object returnEvent, EmptyCallback callback)
{
EmptyCallback intermediary = null;
intermediary =
() => {
dispatcher.RemoveListener(returnEvent, intermediary);
callback.Invoke();
};
dispatcher.AddListener(returnEvent, intermediary);
}
public override void Callback(IEvent evt)
{
callback.Invoke();
}
public override void Callback(object[] xs)
{
callback.Invoke();
}