public function Link($action = null)
    {
        if ($this->shortcodableclass) {
            return Controller::join_links(
                $this->config()->url_base,
                $this->config()->sc_url_segment,
                'edit',
                $this->shortcodableclass
            );
        }
        return Controller::join_links($this->config()->url_base, $this->config()->sc_url_segment, $action);
    }