WP menus that switch based on if user is logged in or not

gistfile1.php

  /**
  * Register menus in functions.php
  */

register_nav_menus( array(
  'logged-in'  => __( 'Logged-in Menu Area',  'yourtheme' ),
  'visitor' => __( 'Visitor Menu Area', 'yourtheme' ),
));


  /**
  * Include in header.php or wherever you want to display menu
  */
if (is_user_logged_in()){
  wp_nav_menu( array(
    'menu'            => 'Logged In Menu',
    'container_class' => 'logged-in-menu',
    'theme_location'  => 'logged-in'
  ));
} else {
  wp_nav_menu( array(
    'menu'            => 'Visitor Menu',
    'container_class' => 'visitor-menu',
    'theme_location'  => 'visitor'
  ));
};