CSharpCodeBlock - [0..21)::21 - [@val?[abc]?.more?.abc]
    CSharpImplicitExpression - [0..21)::21
        CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
            Transition;[@];
        CSharpImplicitExpressionBody - [1..21)::20
            CSharpCodeBlock - [1..21)::20
                CSharpExpressionLiteral - [1..21)::20 - [val?[abc]?.more?.abc] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K14
                    Identifier;[val];
                    QuestionMark;[?];
                    LeftBracket;[[];
                    Identifier;[abc];
                    RightBracket;[]];
                    QuestionMark;[?];
                    Dot;[.];
                    Identifier;[more];
                    QuestionMark;[?];
                    Dot;[.];
                    Identifier;[abc];
