private void uidValidity(Responder responder, MessageManager.MetaData metaData)
     throws MailboxException {
   final long uidValidity = metaData.getUidValidity();
   final StatusResponse untaggedOk =
       statusResponseFactory.untaggedOk(
           HumanReadableText.UID_VALIDITY, ResponseCode.uidValidity(uidValidity));
   responder.respond(untaggedOk);
 }