@NotNull
  public static ExternalizableDuplocatorState registerAndGetState(@NotNull Language language) {
    final MultilanguageDuplocatorSettings settings = MultilanguageDuplocatorSettings.getInstance();
    DefaultDuplocatorState state = settings.getState(language);
    if (state == null) {
      state = new DefaultDuplocatorState();
      settings.registerState(language, state);
    }
    return state;
  }
@NotNull
  public static ExternalizableDuplocatorState registerAndGetState(@NotNull Language language)