NS_QueryNotificationCallbacks(nsIInterfaceRequestor *aCallbacks, nsILoadGroup          *aLoadGroup, nsCOMPtr<T>           &aResult)
NS_QueryNotificationCallbacks(nsIInterfaceRequestor  *aCallbacks, nsILoadGroup           *aLoadGroup, const nsIID            &aIID, void                  **aResult)
NS_QueryNotificationCallbacks(nsIInterfaceRequestor *aCallbacks,                              nsILoadGroup          *aLoadGroup,                              nsCOMPtr<T>           &aResult){    NS_QueryNotificationCallbacks(aCallbacks, aLoadGroup,                                  NS_GET_IID(T),                                  getter_AddRefs(aResult));}