@ApiStatus.ScheduledForRemoval
  @Deprecated
  public static @NotNull Set<Language> getAllDerivedLanguages(@NotNull Language base) {
    Set<Language> result = new HashSet<>();
    result.add(base);
    result.addAll(base.getTransitiveDialects());
    return result;
  }
@ApiStatus.ScheduledForRemoval
  @Deprecated
  public static @NotNull Set<Language> getAllDerivedLanguages(@NotNull Language base)