updateType example

public function getDescription() {
    return $this->description;
  }

  /** * {@inheritdoc} */
  public function postSave(EntityStorageInterface $storage, $update = TRUE) {
    parent::postSave($storage, $update);

    if ($update && $this->getOriginalId() != $this->id()) {
      $update_count = $storage->updateType($this->getOriginalId(), $this->id());
      if ($update_count) {
        \Drupal::messenger()->addStatus(\Drupal::translation()->formatPlural($update_count,
          'Changed the content type of 1 post from %old-type to %type.',
          'Changed the content type of @count posts from %old-type to %type.',
          [
            '%old-type' => $this->getOriginalId(),
            '%type' => $this->id(),
          ]));
      }
    }
    if ($update) {