@Nullable
  public static Url getRepositoryRoot(final SvnVcs vcs, final String url) {
    try {
      return getRepositoryRoot(vcs, createUrl(url));
    }
    catch (SvnBindException e) {
      return null;
    }
  }
@Nullable
  public static Url getRepositoryRoot(final SvnVcs vcs, final String url)