<span parent="groupEditable" class="right-caret"></span> groupEditable</td>
      <td>boolean or Object</td>
      <td><code>false</code></td>
      <td>If true, the groups in the timeline can be manipulated. See also the callbacks <code>onAddGroup</code>, <code>onMoveGroup</code>, and <code>onRemoveGroup</code>. When <code>groupEditable</code> is an object, one can enable or disable individual manipulation actions.
        The editing of groups follows the same principles as for items, see section <a href=