public static AbstractExpression combine(AbstractExpression left, AbstractExpression right) {
        AbstractExpression retval = new ConjunctionExpression(ExpressionType.CONJUNCTION_AND, left, right);
        // Simplify combined expression if possible
        return ExpressionUtil.evaluateExpression(retval);
    }
public static AbstractExpression combine ( AbstractExpression left , AbstractExpression right ) { AbstractExpression retval = new ConjunctionExpression ( ExpressionType . CONJUNCTION_AND , left , right ) ; return ExpressionUtil . evaluateExpression ( retval ) ; }
@param left
@param right
@return Both expressions passed in combined by an And conjunction.