protected function getCustomTransactionOldValue(PhabricatorLiskDAO $object, PhabricatorApplicationTransaction $xaction)
 {
     switch ($xaction->getTransactionType()) {
         case PassphraseCredentialTransaction::TYPE_NAME:
             if ($this->getIsNewObject()) {
                 return null;
             }
             return $object->getName();
         case PassphraseCredentialTransaction::TYPE_DESCRIPTION:
             return $object->getDescription();
         case PassphraseCredentialTransaction::TYPE_USERNAME:
             return $object->getUsername();
         case PassphraseCredentialTransaction::TYPE_SECRET_ID:
             return $object->getSecretID();
         case PassphraseCredentialTransaction::TYPE_DESTROY:
             return (int) $object->getIsDestroyed();
         case PassphraseCredentialTransaction::TYPE_LOCK:
             return (int) $object->getIsLocked();
         case PassphraseCredentialTransaction::TYPE_CONDUIT:
             return (int) $object->getAllowConduit();
         case PassphraseCredentialTransaction::TYPE_LOOKEDATSECRET:
             return null;
     }
     return parent::getCustomTransactionOldValue($object, $xaction);
 }
 protected function getCustomTransactionOldValue(PhabricatorLiskDAO $object, PhabricatorApplicationTransaction $xaction)
 {
     switch ($xaction->getTransactionType()) {
         case AlmanacServiceTransaction::TYPE_NAME:
             return $object->getName();
         case AlmanacServiceTransaction::TYPE_LOCK:
             return (bool) $object->getIsLocked();
     }
     return parent::getCustomTransactionOldValue($object, $xaction);
 }