nsresult rv = loader->LoadDocument(aChannel, aLoaderURI, PR_TRUE, _retval);
nsresult rv = loader->LoadDocument(aChannel, aLoaderURI, PR_TRUE, PR_FALSE, _retval);
nsSyncLoadService::LoadLocalDocument(nsIChannel* aChannel, nsIURI* aLoaderURI,                                     nsIDOMDocument** _retval){    nsSyncLoader* loader = new nsSyncLoader();    NS_ENSURE_TRUE(loader, NS_ERROR_OUT_OF_MEMORY);    NS_ADDREF(loader);    nsresult rv = loader->LoadDocument(aChannel, aLoaderURI, PR_TRUE, _retval);    NS_RELEASE(loader);    return rv;}