Markup block - Gen<None> - 43 - (0:0,0)
    Tag block - Gen<TagHelper> - 43 - (0:0,0) - input - InputTagHelper1 - InputTagHelper3
        SelfClosing - <input bound-required-string class='btn' />
        bound-required-string - Minimized
        class - SingleQuotes
            Markup span - Gen<Markup> - [btn] - SpanEditHandler;Accepts:Any - (36:0,36) - Tokens:1
                HtmlTokenType.Text;[btn];
