public function update()
    {
        $sync = !empty($this->request->query['sync']) ? true : false;
        if (AcoManager::buildAcos(null, $sync)) {
            $this->Flash->success(__d('user', 'Permissions tree was successfully updated!'));
        } else {
            $this->Flash->danger(__d('user', 'Some errors occur while updating permissions tree.'));
        }

        $this->title(__d('user', 'Update Permissions'));
        $this->redirect($this->referer());
    }