code: public static String removeDiacritics(CharSequence input) {
        if (input == null) {
           return null;
        }
        return StringFunctions.DIACRITICS_NORMALIZATION.apply(input.toString());
     }
docs: Normalizes a string by removing the diacritics.
  
  @param input the input string
  @return Resulting string without diacritic marks