       <li id='tree1id3.2.1'>
                                Sub-item 3.2.1
                              </li>
                              <li id='tree1id3.2.2'>
                                Sub-item 3.2.2
                              </li>
                            </ul>
                          </li>
                        </ul>
                      </li>
                      <li class='expanded' id='tree1id4'>
                        Document with some children (expanded on init)
          