nsCStringKey key(aURL); *aResult = NS_STATIC_CAST(nsIXBLDocumentInfo*, mXBLDocTable.Get(&key));
mXBLDocTable.Get(aURL, aResult);
nsXULPrototypeCache::GetXBLDocumentInfo(const nsCString& aURL, nsIXBLDocumentInfo** aResult){    nsCStringKey key(aURL);    *aResult = NS_STATIC_CAST(nsIXBLDocumentInfo*, mXBLDocTable.Get(&key)); // Addref happens here.    return NS_OK;}