docs: public BigMoney rounded(int scale, RoundingMode roundingMode) {
          MoneyUtils.checkNotNull(roundingMode, "RoundingMode must not be null");
          if (scale >= getScale()) {
              return this;
          }
          int currentScale = amount.scale();
          BigDecimal newAmount = amount.setScale(scale, roundingMode).setScale(currentScale);
          return BigMoney.of(currency, newAmount);
      }