"block">If true, the absence of the collection is represented by
 using <code>xsi:nil='true'</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../jakarta/xml/bind/annotation/XmlElementWrapper.html#required--">required</a></span></code>
<div class="block">Customize the wrapper element declaration to be required.</div>
</td>
</tr>
</table>
</li>
</ul>
</li>
</ul>
</div>
<div class="details">
<