Markup block - Gen<None> - 19 - (0:0,0)
    Tag block - Gen<None> - 5 - (0:0,0)
        Markup span - Gen<Markup> - [<foo>] - SpanEditHandler;Accepts:None - (0:0,0) - Symbols:3
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.Text;[foo];
            HtmlSymbolType.CloseAngle;[>];
    Markup span - Gen<None> - [@] - SpanEditHandler;Accepts:Any - (5:0,5) - Symbols:1
        HtmlSymbolType.Transition;[@];
    Markup span - Gen<Markup> - [@] - SpanEditHandler;Accepts:Any - (6:0,6) - Symbols:1
        HtmlSymbolType.Transition;[@];
    Markup span - Gen<None> - [@] - SpanEditHandler;Accepts:Any - (7:0,7) - Symbols:1
        HtmlSymbolType.Transition;[@];
    Markup span - Gen<Markup> - [@] - SpanEditHandler;Accepts:Any - (8:0,8) - Symbols:1
        HtmlSymbolType.Transition;[@];
    Expression block - Gen<Expr> - 4 - (9:0,9)
        Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (9:0,9) - Symbols:1
            CSharpSymbolType.Transition;[@];
        Code span - Gen<Expr> - [bar] - ImplicitExpressionEditHandler;Accepts:NonWhiteSpace;ImplicitExpression[RTD];K14 - (10:0,10) - Symbols:1
            CSharpSymbolType.Identifier;[bar];
    Tag block - Gen<None> - 6 - (13:0,13)
        Markup span - Gen<Markup> - [</foo>] - SpanEditHandler;Accepts:None - (13:0,13) - Symbols:4
            HtmlSymbolType.OpenAngle;[<];
            HtmlSymbolType.ForwardSlash;[/];
            HtmlSymbolType.Text;[foo];
            HtmlSymbolType.CloseAngle;[>];
