docs: public MonetaryFormat repeatOptionalDecimals(int decimals, int repetitions) {
          checkArgument(repetitions >= 0);
          List<Integer> decimalGroups = new ArrayList<>(repetitions);
          for (int i = 0; i < repetitions; i++)
              decimalGroups.add(decimals);
          return new MonetaryFormat(negativeSign, positiveSign, zeroDigit, decimalMark, minDecimals, decimalGroups,
                  shift, roundingMode, codes, codeSeparator, codePrefixed);
      }