@Override
  public void writeSettings(@NotNull Element node) throws WriteExternalException {
    if (!myAdditionalLanguages.isEmpty()) {
      List<String> uniqueLanguages = ContainerUtil.sorted(new HashSet<>(myAdditionalLanguages));
      final String locales = StringUtil.join(uniqueLanguages, ",");
      node.setAttribute(ADDITIONAL_LANGUAGES_ATTR_NAME, locales);
    }
  }
@Override
  public void writeSettings(@NotNull Element node)