title: Dynamically generate pairs of columns with rich:columns
body: <p>Is it possible to dynamically generate <em>pairs</em> of columns using RichFaces' <code>rich:columns</code> component? (Version 3.3.0)</p>
  
  <p>Ideally, I'd like to generate something resembling the following:</p>
  
  <pre><code>+------+--------------+--------------+---------------
  | Name |    1/2/09    |    2/2/09    | 3/2/09 (etc.)
  +------+------+-------+------+-------+-----------
  | .... | Time | Value | Time | Value |
  +------+------+-------+------+-------+-------
  | .... | Time | Value | Time | Value |
  </code></pre>
  
  <p>... that is, a single header cell per column-pair, with the two columns underneath. However, the combined header is not that important.</p>
  
  <p>I've consulted the docs, and while they suggest that a <code>colspan</code> can (somehow) be used, they don't offer any examples.</p>
  
  <p>Any help appreciated!</p>