Wt

I have a WTable, and defined a HeaderCount as 1 and Wt::Orientation::Horizontal.
With that, the HTML is generated as:

<table>
     <colgroup>
          <col id="someid">
          ...
     </colgroup>
     <thead>
          <tr>
               <th>
                  Some text
               </th>
           </tr>
     </thead>
     <tbody>
     </tbody>
</table>

As you can see, the colgroup is empty.
There is some way to remove it?
That colgroup is interfere with my css/js.