 this headline">¶</a></h2>
<dl class="method">
<dt id="Post">
<tt class="descname">Post</tt><big>(</big><em>message</em><span class="optional">[</span>, <em>callback</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#Post" title="Permalink to this definition">¶</a></dt>
<dd><p>Posts a message to all the listeners for the signal.  The listener
callbacks are called in turn (with the message as an argument),
and if any return a <cite>Callback</cite> object, the posting will be
suspen