getUnitedNationsLanguageList example

JS;
    $this->getSession()->executeScript($javascript);
    // Dispatching an `input` event does not work in WebDriver. Enabling another     // toolbar item which has no associated HTML elements forces it.     $this->triggerKeyUp('.ckeditor5-toolbar-item-undo', 'ArrowDown');
    $assert_session->assertWaitOnAjaxRequest();

    // Confirm there are no longer any warnings.     $assert_session->waitForElementRemoved('css', '[data-drupal-messages] [role="alert"]');

    // Test for "United Nations' official languages" option.     $languages = LanguageManager::getUnitedNationsLanguageList();
    $this->languageOfPartsPluginTestHelper($page, $assert_session, $languages, "un");

    // Test for "All 95 languages" option.     $this->drupalGet('admin/config/content/formats/manage/ckeditor5');
    $languages = LanguageManager::getStandardLanguageList();
    $this->languageOfPartsPluginTestHelper($page, $assert_session, $languages, "all");
  }

  /** * Validate the available languages on the basis of selected language option. */
  

class Language extends CKEditor5PluginDefault implements CKEditor5PluginConfigurableInterface {

  use CKEditor5PluginConfigurableTrait;

  /** * {@inheritdoc} */
  public function getDynamicPluginConfig(array $static_plugin_config, EditorInterface $editor): array {
    $predefined_languages = $this->configuration['language_list'] === 'all' ?
      LanguageManager::getStandardLanguageList() :
      LanguageManager::getUnitedNationsLanguageList();

    // Generate the language_list setting as expected by the CKEditor Language     // plugin, but key the values by the full language name so that we can sort     // them later on.     $language_list = [];
    foreach ($predefined_languages as $langcode => $language) {
      $english_name = $language[0];
      $direction = empty($language[2]) ? NULL : $language[2];
      $language_list[$english_name] = [
        'title' => $english_name,
        'languageCode' => $langcode,
      ];