public function hookConstructControllerBackend($controller)
    {
        if ($controller->isQuery('ga.update')) {
            $store_id = $controller->getQuery('ga.update.store_id', '');
            $handler_id = $controller->getQuery('ga.update.handler_id', '');
            $this->getModel()->clearCache($handler_id, $store_id);
            $controller->redirect();
        }
    }