docs: public static String fixUmlauts(String string) {
          String s1 = StringUtils.replace(string, "ä", "ae");
          String s2 = StringUtils.replace(s1, "ö", "oe");
          String s3 = StringUtils.replace(s2, "ü", "ue");
          String s4 = StringUtils.replace(s3, "ß", "ss");
  
          return s4;
      }