@NotNull
  private List<WorkingCopyFormat> getSupportedFormats() {
    List<WorkingCopyFormat> result = new ArrayList<>();
    ClientFactory factory = getVcs().getFactory();

    try {
      result.addAll(factory.createUpgradeClient().getSupportedFormats());
    }
    catch (VcsException e) {
      LOG.info(e);
    }

    return result;
  }
@NotNull
  private List<WorkingCopyFormat> getSupportedFormats()