public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {
      // Restores the more descriptive, specific name for use within this method.
      $page            = $data_object;
      $current_page_id = $current_object_id;

      if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) {
        $t = "\t";
        $n = "\n";
      } else {
        $t = '';
        $n = '';
      }
      if ( $depth ) {
        $indent = str_repeat( $t, $depth );
      } else {
        $indent = '';
      }

      $css_class = array( 'page_item', 'page-item-' . $page->ID );

      if ( isset( $args['pages_with_children'][ $page->ID ] ) ) {
        $css_class[] = 'page_item_has_children';
      }

      if ( ! empty( $current_page_id ) ) {
        $_current_page = get_post( $current_page_id );
        if ( $_current_page && in_array( $page->ID, $_current_page->ancestors, true ) ) {
          $css_class[] = 'current_page_ancestor';
        }
        if ( $page->ID === $current_page_id ) {
          $css_class[] = 'current_page_item';
        } elseif ( $_current_page && $page->ID === $_current_page->post_parent ) {
          $css_class[] = 'current_page_parent';
        }
      } elseif ( get_option( 'page_for_posts' ) === $page->ID ) {
        $css_class[] = 'current_page_parent';
      }

      
/** This filter is documented in wp-includes/class-walker-page.php */
      $css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page_id ) );
      $css_classes = $css_classes ? ' class="' . esc_attr( $css_classes ) . '"' : '';

      if ( '' === $page->post_title ) {
        /* translators: %d: ID of a post. */
        $page->post_title = sprintf( __( '#%d (no title)', 'twentytwenty' ), $page->ID );
      }

      $args['link_before'] = empty( $args['link_before'] ) ? '' : $args['link_before'];
      $args['link_after']  = empty( $args['link_after'] ) ? '' : $args['link_after'];

      $atts                 = array();
      $atts['href']         = get_permalink( $page->ID );
      $atts['aria-current'] = ( $page->ID === $current_page_id ) ? 'page' : '';

      
/** This filter is documented in wp-includes/class-walker-page.php */
      $atts = apply_filters( 'page_menu_link_attributes', $atts, $page, $depth, $args, $current_page_id );

      $attributes = '';
      foreach ( $atts as $attr => $value ) {
        if ( ! empty( $value ) ) {
          $value       = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
          $attributes .= ' ' . $attr . '="' . $value . '"';
        }
      }

      $args['list_item_before'] = '';
      $args['list_item_after']  = '';

      // Wrap the link in a div and append a sub menu toggle.
      if ( isset( $args['show_toggles'] ) && true === $args['show_toggles'] ) {
        // Wrap the menu item link contents in a div, used for positioning.
        $args['list_item_before'] = '<div class="ancestor-wrapper">';
        $args['list_item_after']  = '';

        // Add a toggle to items with children.
        if ( isset( $args['pages_with_children'][ $page->ID ] ) ) {

          $toggle_target_string = '.menu-modal .page-item-' . $page->ID . ' > ul';
          $toggle_duration      = twentytwenty_toggle_duration();

          // Add the sub menu toggle.
          $args['list_item_after'] .= '<button class="toggle sub-menu-toggle fill-children-current-color" data-toggle-target="' . $toggle_target_string . '" data-toggle-type="slidetoggle" data-toggle-duration="' . absint( $toggle_duration ) . '" aria-expanded="false"><span class="screen-reader-text">' . __( 'Show sub menu', 'twentytwenty' ) . '</span>' . twentytwenty_get_theme_svg( 'chevron-down' ) . '</button>';

        }

        // Close the wrapper.
        $args['list_item_after'] .= '</div><!-- .ancestor-wrapper -->';
      }

      // Add icons to menu items with children.
      if ( isset( $args['show_sub_menu_icons'] ) && true === $args['show_sub_menu_icons'] ) {
        if ( isset( $args['pages_with_children'][ $page->ID ] ) ) {
          $args['list_item_after'] = '<span class="icon"></span>';
        }
      }

      $output .= $indent . sprintf(
        '<li%s>%s<a%s>%s%s%s</a>%s',