Markup block - Gen<None> - 12 - (0:0,0)
    Tag block - Gen<TagHelper> - 12 - (0:0,0) - p - PTagHelper
        StartTagAndEndTag - <p> ... </p>
        SyntaxKind.HtmlTextLiteral - [Hello] - [3..8) - FullWidth: 5 - Slots: 1
            SyntaxKind.Text;[Hello];
