Migrate menus into configuration.
function menu_update_8004() {
$uuid = new Uuid();
$result = db_query('SELECT * FROM {menu_custom}');
foreach ($result as $menu) {
// Save the config object.
config('menu.menu.' . $menu->menu_name)
->set('id', $menu->menu_name)
->set('uuid', $uuid
->generate())
->set('label', $menu->title)
->set('description', $menu->description)
->save();
}
}