    </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-4">&#182;</a>               </div>               <h2>manager.undo()</h2>

<p>Performs an undo operation. This operation will
run the <code>synchronize</code> callback if present and will
also trigger an <code>undo</code> event.</p>             </td>             <td class="code">               <div class="highlight"><pr