public static void RegisterHandlerToChannel <T>(this RedisMqHost mqHost, string channel, Func <IMessage <T>, object> processMessageFn, Action <IMessage <T>, Exception> processExceptionEx = null)
{
var handlerMap = (Dictionary <Type, IMessageHandlerFactory>)fieldInfo.GetValue(mqHost);
if (handlerMap.ContainsKey(typeof(T)))
{
throw new ArgumentException("Message handler has already been registered for type: " + typeof(T).Name);
}
handlerMap[typeof(T)] = mqHost.CreateMessageHandlerFactory(channel, processMessageFn, processExceptionEx);
}