trait EntityCreationTrait in Chaos Tool Suite (ctools) 8.3

trait EntityCreationTrait {

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

  /**
   * Creates a custom content type based on default settings.
   *
   * @param string $entity_type
   *   The type of entity to create.
   * @param array $values
   *   An array of settings to change from the defaults.
   *   Example: 'type' => 'foo'.
   *
   * @return \Drupal\Core\Entity\EntityInterface
   *   Created entity.
   */
  protected function createEntity($entity_type, array $values = []) {
    $storage = $this
      ->getEntityTypeManager()
      ->getStorage($entity_type);
    $entity = $storage
      ->create($values);
    $status = $entity
      ->save();
    \Drupal::service('router.builder')
      ->rebuild();
    if ($this instanceof \PHPUnit_Framework_TestCase) {
      $this
        ->assertSame(SAVED_NEW, $status, (new FormattableMarkup('Created entity %id of type %type.', [
        '%id' => $entity
          ->id(),
        '%type' => $entity_type,
      ]))
        ->__toString());
    }
    else {
      $this
        ->assertEquals(SAVED_NEW, $status, (new FormattableMarkup('Created entity %id of type %type.', [
        '%id' => $entity
          ->id(),
        '%type' => $entity_type,
      ]))
        ->__toString());
    }
    return $entity;
  }

  /**
   * @return \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected function getEntityTypeManager() {
    if (!isset($this->entityTypeManager)) {
      $this->entityTypeManager = $this->container
        ->get('entity_type.manager');
    }
    return $this->entityTypeManager;
  }

}