 - The optional owner to determine whether to perform the commit.
              If this is non-null, the commit will only execute if the current top undo
              state contains an operation with the given owner.</dd>
<dt>Returns:</dt>
<dd>Returns an integer identifier for the committed undo state, which
 can later be used to try to uncommit the state to perform further edits on it.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="uncommitState(int,icyllis.modernui.core.UndoOwner)">
<h3>unc