docs: public static BigDecimal round(BigDecimal number, int scale, RoundingMode roundingMode) {
  		if (null == number) {
  			number = BigDecimal.ZERO;
  		}
  		if (scale < 0) {
  			scale = 0;
  		}
  		if (null == roundingMode) {
  			roundingMode = RoundingMode.HALF_UP;
  		}
  
  		return number.setScale(scale, roundingMode);
  	}