@Override
  @Nullable
  public VcsHistorySession createSessionFor(final FilePath filePath) throws VcsException {
    final VcsAppendableHistoryPartnerAdapter adapter = new VcsAppendableHistoryPartnerAdapter();
    reportAppendableHistory(filePath, adapter);
    adapter.check();

    return adapter.getSession();
  }
@Override
  @Nullable
  public VcsHistorySession createSessionFor(final FilePath filePath)