edlp_d8/core/modules/tour/tests/tour_test/tour_test.module

<?php

/**
 * @file
 * Provides tests for tour module
 */

use Drupal\Core\Entity\EntityInterface;

/**
 * Implements hook_ENTITY_TYPE_load() for tour.
 */
function tour_test_tour_load($entities) {
  if (isset($entities['tour-entity-create-test-en'])) {
    $entities['tour-entity-create-test-en']->loaded = 'Load hooks work';
  }
}

/**
 * Implements hook_ENTITY_TYPE_presave() for tour.
 */
function tour_test_tour_presave($entity) {
  if ($entity->id() == 'tour-entity-create-test-en') {
    $entity->set('label', $entity->label() . ' alter');
  }
}

/**
 * Implements hook_tour_tips_alter().
 */
function tour_test_tour_tips_alter(array &$tour_tips, EntityInterface $entity) {
  foreach ($tour_tips as $tour_tip) {
    if ($tour_tip->get('id') == 'tour-code-test-1') {
      $tour_tip->set('body', 'Altered by hook_tour_tips_alter');
    }
  }
}