public function store() {
        $options = $this->getOptions();
        $key = self::DEFAULT_REGISTRY_KEY;

        if (isset($options['storage']['registry']['key'])
            && !empty($options['storage']['registry']['key'])
        ) {
            $key = $options['storage']['registry']['key'];
        }

        Zend_Registry::set($key, $this->_acl);
    }