public void RegisterCallback <TEventType, TUserArgsType>(EventCallback <TEventType, TUserArgsType> callback, TUserArgsType userArgs, TrickleDown useTrickleDown = TrickleDown.NoTrickleDown) where TEventType : EventBase <TEventType>, new()
{
if (m_CallbackRegistry == null)
{
m_CallbackRegistry = new EventCallbackRegistry();
}
m_CallbackRegistry.RegisterCallback <TEventType, TUserArgsType>(callback, userArgs, useTrickleDown);
GlobalCallbackRegistry.RegisterListeners <TEventType>(this, callback, useTrickleDown);
}