protected function getMailAction(PhabricatorLiskDAO $object, array $xactions)
 {
     $action = parent::getMailAction($object, $xactions);
     $strongest = $this->getStrongestAction($object, $xactions);
     switch ($strongest->getTransactionType()) {
         case DifferentialTransaction::TYPE_UPDATE:
             $count = new PhutilNumber($object->getLineCount());
             $action = pht('%s, %s line(s)', $action, $count);
             break;
     }
     return $action;
 }