class FilterFormat

class FilterFormat extends StringData implements OptionsProviderInterface {
  
  /**
   * {@inheritdoc}
   */
  public function getPossibleValues(?AccountInterface $account = NULL) {
    return array_keys($this->getPossibleOptions($account));
  }
  
  /**
   * {@inheritdoc}
   */
  public function getPossibleOptions(?AccountInterface $account = NULL) {
    return $this->getFormatsAsOptions($account);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getSettableValues(?AccountInterface $account = NULL) {
    return array_keys($this->getSettableOptions($account));
  }
  
  /**
   * {@inheritdoc}
   */
  public function getSettableOptions(?AccountInterface $account = NULL) {
    return $this->getFormatsAsOptions($account);
  }
  
  /**
   * Returns a list of filter format config entity labels keyed by their ID.
   *
   * @param \Drupal\Core\Session\AccountInterface|null $account
   *   (optional) The user account for which to filter the options. If omitted,
   *   all options are returned.
   *
   * @return array<string, \Drupal\filter\FilterFormatInterface>
   *   A list of filter format config entity labels keyed by their ID.
   */
  protected function getFormatsAsOptions(?AccountInterface $account = NULL) : array {
    $repository = \Drupal::service(FilterFormatRepositoryInterface::class);
    return array_map(fn(FilterFormatInterface $format): string|\Stringable => $format->label(), $account ? $repository->getFormatsForAccount($account) : $repository->getAllFormats());
  }

}