MC4WP_Form_Asset_Manager::register_assets PHP Method

    public function register_assets()
    {
        $suffix = $this->filename_suffix;
        /**
         * Runs right after all assets (scripts & stylesheets) for forms have been registered
         *
         * @since 3.0
         * @deprecated 3.1.9
         *
         * @param string $suffix The suffix to add to the filename, before the file extension. Is usually set to ".min".
         * @ignore
         */
        do_action('mc4wp_register_form_assets', $suffix);
    }