protected function sendMail(PhabricatorLiskDAO $object, array $xactions)
 {
     // Avoid sending emails that only talk about commit discovery.
     $types = array_unique(mpull($xactions, 'getTransactionType'));
     if ($types === array(ReleephRequestTransaction::TYPE_DISCOVERY)) {
         return null;
     }
     // Don't email people when we discover that something picks or reverts OK.
     if ($types === array(ReleephRequestTransaction::TYPE_PICK_STATUS)) {
         if (!mfilter($xactions, 'isBoringPickStatus', true)) {
             // If we effectively call "isInterestingPickStatus" and get nothing...
             return null;
         }
     }
     return parent::sendMail($object, $xactions);
 }