group-8.x-1.x-dev/tests/modules/group_test/group_test.module

<?php

/**
 * @file
 * Helper module for the Group tests.
 */

use Drupal\Core\Hook\Attribute\LegacyHook;
use Drupal\user\UserInterface;
use Drupal\group_test\Hook\EntityHooks;

/**
 * Implements hook_ENTITY_TYPE_update().
 */
#[LegacyHook]
function group_test_user_update(UserInterface $user) {
  \Drupal::service(EntityHooks::class)->testUserUpdate($user);
}