public void Visit(NullOperator op)
        {
            var leftArgs = VisitChild(op.Left);
            var rightArgs = VisitChild(op.Right);

            _codeStack.Peek().Scope = leftArgs.Scope;
            _codeStack.Peek().CodeExpression = new CodeMethodInvokeExpression(leftArgs.CodeExpression, "NullOperator", rightArgs.CodeExpression);
        }
 public void Visit(NullOperator op, CommonTree tree)
 {
     SetLine(op, tree);
     Parent(tree).Children.Add(op);
     VisitChildren(tree);
 }