return it->QueryInterface(kIFrameImageLoaderIID, (void**) aResult);
return it->QueryInterface(NS_GET_IID(nsIFrameImageLoader), (void**) aResult);
NS_NewFrameImageLoader(nsIFrameImageLoader** aResult){  NS_PRECONDITION(aResult, "null ptr");  if (!aResult) {    return NS_ERROR_NULL_POINTER;  }  nsFrameImageLoader* it = new nsFrameImageLoader();  if (!it) {    return NS_ERROR_OUT_OF_MEMORY;  }  return it->QueryInterface(kIFrameImageLoaderIID, (void**) aResult);}