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);
    }

}