class SaveAction

class SaveAction extends EntityActionBase {
  
  /**
   * The time service.
   *
   * @var \Drupal\Component\Datetime\TimeInterface
   */
  protected $time;
  
  /**
   * Constructs a SaveAction object.
   *
   * @param mixed[] $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin ID for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Component\Datetime\TimeInterface $time
   *   The time service.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, TimeInterface $time) {
    parent::__construct($configuration, $plugin_id, $plugin_definition, $entity_type_manager);
    $this->time = $time;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container->get('entity_type.manager'), $container->get('datetime.time'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function execute($entity = NULL) {
    $entity->setChangedTime($this->time
      ->getRequestTime())
      ->save();
  }
  
  /**
   * {@inheritdoc}
   */
  public function access($object, ?AccountInterface $account = NULL, $return_as_object = FALSE) {
    // It's not necessary to check the changed field access here, because
    // Drupal\Core\Field\ChangedFieldItemList would anyway return 'not allowed'.
    // Also changing the changed field value is only a workaround to trigger an
    // entity resave. Without a field change, this would not be possible.
    /** @var \Drupal\Core\Entity\EntityInterface $object */
    return $object->access('update', $account, $return_as_object);
  }

}