CSharpCodeBlock - [0..11)::11 - [@val?[more.]
    CSharpImplicitExpression - [0..11)::11
        CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
            Transition;[@];
        CSharpImplicitExpressionBody - [1..11)::10
            CSharpCodeBlock - [1..11)::10
                CSharpExpressionLiteral - [1..11)::10 - [val?[more.] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:Any;ImplicitExpression[RTD];K14
                    Identifier;[val];
                    QuestionMark;[?];
                    LeftBracket;[[];
                    Identifier;[more];
                    Dot;[.];
