@Override
  public void stopIndexing(MavenRepositoryInfo info, MavenToken token) {
    MavenServerUtil.checkToken(token);
    IndexProcessData data = states.get(info.getUrl());
    if (data != null) {
      data.isCanceled = true;
    }
  }
@Override
  public void stopIndexing(MavenRepositoryInfo info, MavenToken token)