Markup block - Gen<None> - 31 - (0:0,0)
    Tag block - Gen<TagHelper> - 31 - (0:0,0) - script - scripttaghelper
        StartTagAndEndTag - <script> ... </script>
        Markup span - Gen<Markup> - [<script></foo>] - SpanEditHandler;Accepts:Any - (8:0,8) - Tokens:7
            HtmlTokenType.OpenAngle;[<];
            HtmlTokenType.Text;[script];
            HtmlTokenType.CloseAngle;[>];
            HtmlTokenType.OpenAngle;[<];
            HtmlTokenType.ForwardSlash;[/];
            HtmlTokenType.Text;[foo];
            HtmlTokenType.CloseAngle;[>];
