StickyNode.php

<?php

namespace Drupal\node\Plugin\Action;

use Drupal\Core\Action\Attribute\Action;
use Drupal\Core\Field\FieldUpdateActionBase;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\node\NodeInterface;

/**
 * Makes a node sticky.
 */
class StickyNode extends FieldUpdateActionBase {
  
  /**
   * {@inheritdoc}
   */
  protected function getFieldsToUpdate() {
    return [
      'sticky' => NodeInterface::STICKY,
    ];
  }

}