            <th scope="row"><code>aria-expanded="true"</code></th>
              <td><code>li</code></td>
              <td>
                <ul>
                  <li>Applied only to <code>treeitem</code> elements that are parent nodes, i.e., they contain a <code>ul</code> with the <code>group</code> role.</li>
                  <li>Indicates the parent node is open, i.e., the descendant elements <strong>are</strong> visible.</li>
                  <li>The visual indication of the expanded state is synchro