Source

File: wp-includes/customize/class-wp-customize-nav-menus-panel.php

public function render_screen_options() {
		// Adds the screen options.
		require_once ABSPATH . 'wp-admin/includes/nav-menu.php';
		add_filter( 'manage_nav-menus_columns', 'wp_nav_menu_manage_columns' );

		// Display screen options.
		$screen = WP_Screen::get( 'nav-menus.php' );
		$screen->render_screen_options( array( 'wrap' => false ) );
	}