CSharpCodeBlock - [0..10)::10 - [@val?.more]
    CSharpImplicitExpression - [0..10)::10
        CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
            Transition;[@];
        CSharpImplicitExpressionBody - [1..10)::9
            CSharpCodeBlock - [1..10)::9
                CSharpExpressionLiteral - [1..10)::9 - [val?.more] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K14
                    Identifier;[val];
                    QuestionMark;[?];
                    Dot;[.];
                    Identifier;[more];
