an class="identifier">channel_logger</span></a><span class="special">(</span><span class="identifier">ChannelT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  <a class="link" href="channel_logger.html" title="Class template channel_logger">channel_logger</a> <span class="special">&amp;</span> <a class="link" href="channel_logger.html#idm46093048955456-bb"><span class="keyword">operator</span><span class="special">=</s