public Boolean renameNX(byte[] oldName, byte[] newName) {
   try {
     if (isPipelined()) {
       pipeline(pipeline.renamenx(oldName, newName));
       return null;
     }
     return (client.renamenx(oldName, newName).data() == 1);
   } catch (Exception ex) {
     throw convertSrpAccessException(ex);
   }
 }