*/
  public static BaseEncoding base64Url() {
    return BASE64_URL;
  }

  private static final BaseEncoding BASE32 =
      new StandardBaseEncoding("base32()", "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567", '=');

  /**
   * The "base32" encoding specified by <a href="http://tools.ietf.org/html/rfc4648#section-6">RFC
   * 4648 section 6</a>, Base 32 Encoding. (This is the same as the base 32 encoding from <a