nction will nest until
 they are all matched by a later call to <a href="#endUpdate()"><code>endUpdate()</code></a>.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>label</code> - Optional user-visible label for this new undo state.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="isInUpdate()">
<h3>isInUpdate</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isInUpdate</span>()</div>
<di