public function getSummary()
 {
     $txt = '';
     if ($this->areaHistoryModel->getIsNew()) {
         $txt .= 'New! ' . "\n";
     }
     if ($this->areaHistoryModel->isAnyChangeFlagsUnknown()) {
         $txt .= $this->areaHistoryModel->getDescription();
     } else {
         if ($this->areaHistoryModel->getTitleChanged()) {
             $txt .= 'Title Changed. ' . "\n";
         }
         if ($this->areaHistoryModel->getDescriptionChanged()) {
             $txt .= 'Description Changed. ' . "\n";
         }
         if ($this->areaHistoryModel->getParentAreaIdChanged()) {
             $txt .= 'Parent Area Changed. ' . "\n";
         }
         if ($this->areaHistoryModel->getCountryIdChanged()) {
             $txt .= 'Country Changed. ' . "\n";
         }
         if ($this->areaHistoryModel->getIsDeletedChanged()) {
             $txt .= 'Deleted Changed: ' . ($this->areaHistoryModel->getIsDeleted() ? "Deleted" : "Restored") . "\n\n";
         }
     }
     return $txt;
 }