MarkupBlock - [0..31)::31 - [<foo><?xml foo @bar baz?></foo>]
    MarkupTagBlock - [0..5)::5 - [<foo>]
        MarkupTextLiteral - [0..5)::5 - [<foo>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            Text;[foo];
            CloseAngle;[>];
    MarkupTextLiteral - [5..15)::10 - [<?xml foo ] - Gen<Markup> - SpanEditHandler;Accepts:Any
        OpenAngle;[<];
        QuestionMark;[?];
        Text;[xml];
        Whitespace;[ ];
        Text;[foo];
        Whitespace;[ ];
    CSharpCodeBlock - [15..19)::4
        CSharpImplicitExpression - [15..19)::4
            CSharpTransition - [15..16)::1 - Gen<None> - SpanEditHandler;Accepts:None
                Transition;[@];
            CSharpImplicitExpressionBody - [16..19)::3
                CSharpCodeBlock - [16..19)::3
                    CSharpExpressionLiteral - [16..19)::3 - [bar] - Gen<Expr> - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K14
                        Identifier;[bar];
    MarkupTextLiteral - [19..25)::6 - [ baz?>] - Gen<Markup> - SpanEditHandler;Accepts:None
        Whitespace;[ ];
        Text;[baz];
        QuestionMark;[?];
        CloseAngle;[>];
    MarkupTagBlock - [25..31)::6 - [</foo>]
        MarkupTextLiteral - [25..31)::6 - [</foo>] - Gen<Markup> - SpanEditHandler;Accepts:None
            OpenAngle;[<];
            ForwardSlash;[/];
            Text;[foo];
            CloseAngle;[>];
