Markup block - Gen<None> - 31 - (0:0,0)
    Tag block - Gen<None> - 5 - (0:0,0)
        Markup span - Gen<Markup> - [<foo>] - SpanEditHandler;Accepts:None - (0:0,0) - Tokens:3
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.Text;[foo];
            SyntaxKind.CloseAngle;[>];
    Markup span - Gen<Markup> - [<?xml foo ] - SpanEditHandler;Accepts:Any - (5:0,5) - Tokens:6
        SyntaxKind.OpenAngle;[<];
        SyntaxKind.QuestionMark;[?];
        SyntaxKind.Text;[xml];
        SyntaxKind.Whitespace;[ ];
        SyntaxKind.Text;[foo];
        SyntaxKind.Whitespace;[ ];
    Expression block - Gen<Expr> - 4 - (15:0,15)
        Transition span - Gen<None> - [@] - SpanEditHandler;Accepts:None - (15:0,15) - Tokens:1
            SyntaxKind.Transition;[@];
        Code span - Gen<Expr> - [bar] - ImplicitExpressionEditHandler;Accepts:NonWhitespace;ImplicitExpression[RTD];K14 - (16:0,16) - Tokens:1
            SyntaxKind.Identifier;[bar];
    Markup span - Gen<Markup> - [ baz?>] - SpanEditHandler;Accepts:None - (19:0,19) - Tokens:4
        SyntaxKind.Whitespace;[ ];
        SyntaxKind.Text;[baz];
        SyntaxKind.QuestionMark;[?];
        SyntaxKind.CloseAngle;[>];
    Tag block - Gen<None> - 6 - (25:0,25)
        Markup span - Gen<Markup> - [</foo>] - SpanEditHandler;Accepts:None - (25:0,25) - Tokens:4
            SyntaxKind.OpenAngle;[<];
            SyntaxKind.ForwardSlash;[/];
            SyntaxKind.Text;[foo];
            SyntaxKind.CloseAngle;[>];
