group-8.x-1.x-dev/tests/modules/group_test/src/Hook/EntityHooks.php

<?php

declare(strict_types=1);

namespace Drupal\group_test\Hook;

use Drupal\Core\Hook\Attribute\Hook;
use Drupal\user\UserInterface;

/**
 * Entity hook implementations for Group test.
 */
final class EntityHooks {

  /**
   * Implements hook_ENTITY_TYPE_update().
   */
  #[Hook('user_update')]
  public function testUserUpdate(UserInterface $user): void {
    if ($user->getChangedTime() == 123456789) {
      $user->setChangedTime(530496000)->save();
    }
  }

}