Markup block - Gen<None> - 49 - (0:0,0)
    Tag block - Gen<TagHelper> - 49 - (0:0,0) - p - ptaghelper
        StartTagAndEndTag - <p class="foo" style="color:red;"> ... </p>
        class - DoubleQuotes
            Markup span - Gen<Markup> - [foo] - SpanEditHandler;Accepts:Any - (10:0,10) - Tokens:1
                HtmlTokenType.Text;[foo];
        style - DoubleQuotes
            Markup span - Gen<Markup> - [color:red;] - SpanEditHandler;Accepts:Any - (22:0,22) - Tokens:1
                HtmlTokenType.Text;[color:red;];
        Markup span - Gen<Markup> - [Hello World] - SpanEditHandler;Accepts:Any - (34:0,34) - Tokens:3
            HtmlTokenType.Text;[Hello];
            HtmlTokenType.WhiteSpace;[ ];
            HtmlTokenType.Text;[World];
