* @param decimalPlaces
     * @param a_RoundingMode
     * @return The rootRoundIfNecessary rootRoundIfNecessary of x to
     * decimalPlaces precision.
     */
    private static BigDecimal rootLessThanOne(
            BigDecimal x,
            int root,
            //Generic_BigDecimal a_Generic_BigDecimal,
            int decimalPlaces,
            RoundingMode a_RoundingMode) {
        return rootLessThanOne(
                x,
                BigInteger.valueOf(root),
                //a_Generic_BigDecimal,
                decimalPlaces,
                a_RoundingMode);
    }