db_fields = $fields;
		}
	}
	/**
	 * Starts the list before the elements are added.
	 *
	 * @see Walker_Nav_Menu::start_lvl()
	 *
	 * @since 3.0.0
	 *
	 * @param string   $output Used to append additional content (passed by reference).
	 * @param int      $depth  Depth of page. Used for padding.
	 * @param stdClass $args   Not used.
	 */
	public function start_lvl( &$output, $depth = 0, $args = null ) {
		$indent  = str_repeat( "\t", $depth );
		$output .= "\n$indent
\n";
	}
	/**
	 * Ends the list of after the elements are added.
	 *
	 * @see Walker_Nav_Menu::end_lvl()
	 *
	 * @since 3.0.0
	 *
	 * @param string   $output Used to append additional content (passed by reference).
	 * @param int      $depth  Depth of page. Used for padding.
	 * @param stdClass $args   Not used.
	 */
	public function end_lvl( &$output, $depth = 0, $args = null ) {
		$indent  = str_repeat( "\t", $depth );
		$output .= "\n$indent
";
	}
	/**
	 * Start the element output.
	 *
	 * @see Walker_Nav_Menu::start_el()
	 *
	 * @since 3.0.0
	 * @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
	 *              to match parent class for PHP 8 named parameter support.
	 *
	 * @global int        $_nav_menu_placeholder
	 * @global int|string $nav_menu_selected_id
	 *
	 * @param string   $output            Used to append additional content (passed by reference).
	 * @param WP_Post  $data_object       Menu item data object.
	 * @param int      $depth             Depth of menu item. Used for padding.
	 * @param stdClass $args              Not used.
	 * @param int      $current_object_id Optional. ID of the current menu item. Default 0.
	 */
	public function start_el( &$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {
		global $_nav_menu_placeholder, $nav_menu_selected_id;
		// Restores the more descriptive, specific name for use within this method.
		$menu_item = $data_object;
		$_nav_menu_placeholder = ( 0 > $_nav_menu_placeholder ) ? (int) $_nav_menu_placeholder - 1 : -1;
		$possible_object_id    = isset( $menu_item->post_type ) && 'nav_menu_item' === $menu_item->post_type ? $menu_item->object_id : $_nav_menu_placeholder;
		$possible_db_id        = ( ! empty( $menu_item->ID ) ) && ( 0 < $possible_object_id ) ? (int) $menu_item->ID : 0;
		$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
		$output .= $indent . '';
		$output .= '';
		// Menu item hidden fields.
		$output .= '';
		$output .= '';
		$output .= '';
		$output .= '';
		$output .= '';
		$output .= '';
		$output .= '';
		$output .= '';
		$output .= '';
		$output .= '';
	}
}