CSharpCodeBlock - [0..1)::1 - [@]
    CSharpImplicitExpression - [0..1)::1
        CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
            Transition;[@];
        CSharpImplicitExpressionBody - [1..1)::0
            CSharpCodeBlock - [1..1)::0
                CSharpExpressionLiteral - [1..1)::0 - [] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K14
                    Marker;[];
