public function postProcess()
 {
     if (_PS_MODE_DEMO_ || !Tools::getValue('import') || !Tools::getValue('csv')) {
         parent::postProcess();
         return;
     }
     $db = Db::getInstance();
     $db->query("SET AUTOCOMMIT = 0");
     $db->query("START TRANSACTION");
     parent::postProcess();
     $db->query("COMMIT");
 }