private void AddToListenerDict <P0, P1>(string eventName, Action <P0, P1> handler)
{
var eventDispatcher = this.eventDispatchers.GetEventDispatcher <P0, P1>();
if (!listenerDict.ContainsKey(eventDispatcher))
{
listenerDict[eventDispatcher] = new ValueListDictionary <string, object>();
}
if (!listenerDict[eventDispatcher].ContainsKey(eventName))
{
listenerDict[eventDispatcher][eventName] = new List <object>();
}
listenerDict[eventDispatcher][eventName].Add(handler);
}
