public List<String> negativeCase(BigInteger min, BigInteger max, List<String> values) {
        BigInteger minMinusOne = min.subtract(BigInteger.ONE);
        BigInteger maxPlusOne = max.add(BigInteger.ONE);
        values.add(minMinusOne.toString());
        values.add(maxPlusOne.toString());
        return values;
    }
public List < String > negativeCase ( BigInteger min , BigInteger max , List < String > values ) { BigInteger minMinusOne = min . subtract ( BigInteger . ONE ) ; BigInteger maxPlusOne = max . add ( BigInteger . ONE ) ; values . add ( minMinusOne . toString ( ) ) ; values . add ( maxPlusOne . toString ( ) ) ; return values ; }
@param min    a BigInteger containing the min defined by Action
@param max    a BigInteger containing the max defined by Action
@param values a list of boundary values
@return a list of BigIntegers with the boundary values -/+ one