MarkupBlock - [0..19)::19 - [<foo>@@@@@bar</foo>]
    MarkupTagBlock - [0..5)::5 - [<foo>]
        MarkupTextLiteral - [0..5)::5 - [<foo>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            Text;[foo];
            CloseAngle;[>];
    MarkupEphemeralTextLiteral - [5..6)::1 - [@] - Gen<None> - SpanEditHandler;Accepts:Any
        Transition;[@];
    MarkupTextLiteral - [6..7)::1 - [@] - Gen<Markup> - SpanEditHandler;Accepts:Any
        Transition;[@];
    MarkupEphemeralTextLiteral - [7..8)::1 - [@] - Gen<None> - SpanEditHandler;Accepts:Any
        Transition;[@];
    MarkupTextLiteral - [8..9)::1 - [@] - Gen<Markup> - SpanEditHandler;Accepts:Any
        Transition;[@];
    CSharpCodeBlock - [9..13)::4
        CSharpImplicitExpression - [9..13)::4
            CSharpTransition - [9..10)::1 - Gen<None> - SpanEditHandler;Accepts:None
                Transition;[@];
            CSharpImplicitExpressionBody - [10..13)::3
                CSharpCodeBlock - [10..13)::3
                    CSharpExpressionLiteral - [10..13)::3 - [bar] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K14
                        Identifier;[bar];
    MarkupTagBlock - [13..19)::6 - [</foo>]
        MarkupTextLiteral - [13..19)::6 - [</foo>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            ForwardSlash;[/];
            Text;[foo];
            CloseAngle;[>];
