rong> &#8212; the listener to be removed from signal</li>
</ul>
</td>
</tr>
<tr class="field"><th class="field-name">Returns :</th><td class="field-body"><p class="first last"><tt class="docutils literal"><span class="pre">null</span></tt></p>
</td>
</tr>
</tbody>
</table>
</dd></dl>

<dl class="method">
<dt id="MessageHook">
<tt class="descname">MessageHook</tt><big>(</big><em>message</em>, <em>callback</em><big>)</big><a class="headerlink" href="#MessageHook" title="Permalink to this definition">¶</a></d