rv = aHandler->GetHelpInfo(text);
rv = clh->GetHelpInfo(text);
EnumHelp(nsICommandLineHandler* aHandler, nsICommandLine* aThis, void* aClosure){  nsresult rv;  nsCString text;  rv = aHandler->GetHelpInfo(text);  if (NS_SUCCEEDED(rv)) {    NS_ASSERTION(text.Length() == 0 || text.Last() == '\n',                 "Help text from command line handlers should end in a newline.");    nsACString* totalText = NS_REINTERPRET_CAST(nsACString*, aClosure);    totalText->Append(text);  }  return NS_OK;}  