iption</th>
                    <th>Example</th>
                </tr>
                <tr>
                    <td>getRootNodes</td>
                    <td>Returns the root branches</td>
                    <td>
                        <pre><code class="javascript">// Expand all root nodes
$('.tree').treegrid('getRootNodes').treegrid('expand');</code></pre>
                    </td>
                </tr>
                <tr>
                    <td>getNodeId</td>
                    <td>Return the id of n