@Override
  public @Nullable TreeState fromString(@NotNull String value) {
    try {
      final Element element = JDOMUtil.load(value);
      return TreeState.createFrom(element);
    }
    catch (IOException e) {
      return null;
    }
    catch (JDOMException e) {
      throw new RuntimeException(e);
    }
  }
@Override
  public @Nullable TreeState fromString(@NotNull String value)