code: function startTagInColumnGroup(p, token) {
      var tn = token.tagName;
  
      if (tn === $.HTML)
          startTagInBody(p, token);
  
      else if (tn === $.COL)
          p._appendElement(token, NS.HTML);
  
      else if (tn === $.TEMPLATE)
          startTagInHead(p, token);
  
      else
          tokenInColumnGroup(p, token);
  }
docs: 12.2.5.4.12 The "in column group" insertion mode ------------------------------------------------------------------