Integrate openpos + WooCommerce PDF Product Vouchers

/**
 * Plugin Name: WooCommerce PDF Product Vouchers
 * Plugin URI: http://www.woocommerce.com/products/pdf-product-vouchers/
 * Documentation URI: https://docs.woocommerce.com/document/woocommerce-pdf-product-vouchers/
 * Description: Customize and sell PDF product vouchers with WooCommerce
 * Author: SkyVerge
 * Author URI: http://www.woocommerce.com
 * Version: 3.9.3
 * Text Domain: woocommerce-pdf-product-vouchers
 * Domain Path: /i18n/languages/
 *
 * Copyright: (c) 2012-2021, SkyVerge (info@skyverge.com)
 *
 * License: GNU General Public License v3.0
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 *
 * @package   WC-PDF-Product-Vouchers
 * @author    SkyVerge
 * @category  Plugin
 * @copyright Copyright (c) 2012-2021, SkyVerge, Inc. (info@skyverge.com)
 * @license   http://www.gnu.org/licenses/gpl-3.0.html GNU General Public License v3.0
 *
 * Woo: 201963:76aaaee5ebc9fdab1847c6f3caf295b3
 * WC requires at least: 3.5
 * WC tested up to: 5.1.0
 */