is widget belongs to.</td>
  <td><a href="/doc/api/1.0/CWidget">CWidget</a></td>
</tr>
<tr id="cookieId">
  <td><a href="/doc/api/1.0/CTreeView#cookieId-detail">cookieId</a></td>
  <td>string</td>
  <td>The cookie name to use when persisting via persist:"cookie".</td>
  <td>CTreeView</td>
</tr>
<tr id="cssFile">
  <td><a href="/doc/api/1.0/CTreeView#cssFile-detail">cssFile</a></td>
  <td>mixed</td>
  <td>the CSS file used for the widget.</td>
  <td>CTreeView</td>
</tr>
<tr id="data">
  <td><a href="/doc/api