code: public static CheckSum compute(String valueToChecksum) {
          return new CheckSum(MD5Util.computeMD5(
                  //remove "Unknown" unicode char 65533
                  Normalizer.normalize(
                      StringUtil.standardizeLineEndings(valueToChecksum)
                              .replace("\uFFFD", "")
                          , Normalizer.Form.NFC)
          ), getCurrentVersion());
      }
docs: Compute a storedCheckSum of the given string.