Drupal entityqueue - How to get / load items programmatically

entityqueue_load.php

<?php

/**
 * @file
 *
 * Assuming that you've created a queue using the simple queue handler,
 * that means a subqueue has been created automatically with the same name
 * as the queue.
 * Therefore, to get the (sub)queue items programatically, you can do this:
 */

$queue = \Drupal::entityTypeManager()->getStorage('entity_subqueue')->load('queue_id');
$items = $queue->items->referencedEntities();