> arg<span class="special">,</span> 
                <span class="keyword">bool</span> <span class="special">&amp;</span> res<span class="special">)</span><span class="special">;</span></pre></li></ol></div>
</div>
<div class="refsect2">
<a name="idp99864848"></a><h3>
<a name="idp36953328-bb"></a><code class="computeroutput">channel_visitor</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="identifier">re