Only display nav menu if it is populated with menu items?

This solution was shared by @TheDeadMedic over here…

$menu_exists_and_has_items = wp_nav_menu( 
    array(
        'theme_location' => 'example-menu-location',
        'container_class' => 'example-menu-container',
        'menu_class'     => 'example-menu-class',
        'fallback_cb'    => false,
        'echo'           => false
    )
);

if ( $menu_exists_and_has_items ) {
...

Importantly, note that the menu is not echoed in the initial array saved to PHP variable…