nsString * aCharset,
const nsIAtom * aCharset,
NS_IMETHODIMP nsCharsetConverterManager::GetCharsetLangGroup(                                         nsString * aCharset,                                          nsIAtom ** aResult){  if (aCharset == NULL) return NS_ERROR_NULL_POINTER;  if (aResult == NULL) return NS_ERROR_NULL_POINTER;  *aResult = NULL;  nsAutoString prop; prop.AssignWithConversion(".LangGroup");  nsCOMPtr<nsIAtom> atom;  nsresult res = GetCharsetAtom(aCharset->get(), getter_AddRefs(atom));  if (NS_FAILED(res)) return res;  res = GetCharsetLangGroup(atom, aResult);  return res;}