Markup block - Gen<None> - 6 - (0:0,0)
    Tag block - Gen<None> - 1 - (0:0,0)
        Markup span - Gen<Markup> - [<] - SpanEditHandler;Accepts:Any - (0:0,0) - Tokens:1
            HtmlTokenType.OpenAngle;[<];
    Tag block - Gen<TagHelper> - 5 - (1:0,1) - p - ptaghelper
        SelfClosing - <p />
