/**
  * Creates subscriptions against a users account with a status of pending when a user creates
  * an order containing subscriptions.
  *
  * @param int|WC_Order $order The order ID or WC_Order object to create the subscription from.
  * @since 1.0
  */
 public static function process_subscriptions_on_checkout($order)
 {
     _deprecated_function(__METHOD__, '2.0', 'WC_Subscriptions_Checkout::process_checkout()');
     if (!empty($_POST['_wpnonce']) && wp_verify_nonce($_POST['_wpnonce'], 'woocommerce-process_checkout')) {
         WC_Subscriptions_Checkout::process_checkout($order, $_POST);
     }
 }