public function getActionHandlers()
    {
        $handlers = &gplcart_static('image.style.action.handlers');

        if (isset($handlers)) {
            return (array) $handlers;
        }

        $handlers = (array) gplcart_config_get(GC_FILE_CONFIG_IMAGE_ACTION);
        $this->hook->attach('image.style.action.handlers', $handlers, $this);
        return (array) $handlers;
    }