<form id="wu_form" method="post" class="wu-styling wu-relative">

  <?php

  /**
   * Instantiate the form for the order details.
   *
   * @since 2.0.0
   */
  $order_form = new \WP_Ultimo\UI\Form('product-fields', $product_fields, array(
	  'title' => __('Products', 'wp-ultimo'),
	  'views' => 'checkout/fields',
  ));

  /**
   * Render form fields.
   *
   * @see /view/checkout/fields/ for the template files for each field type.
   * @since 2.0.0
   */
  $order_form->render();

	/**
	 * Instantiate the form for the submit button and such.
	 *
	 * @since 2.0.0
	 */
	$submit = new \WP_Ultimo\UI\Form('submit-fields', $submit_fields, array('views' => 'checkout/fields'));

	/**
	 * Render form fields.
	 *
	 * @see /view/checkout/fields/ for the template files for each field type.
	 * @since 2.0.0
	 */
	$submit->render();

	/**
	 * Add a security nonce field.
	 */
	wp_nonce_field('wu_checkout');

	?>

</form>
