eyword">const</span> subscribe_callback_t&amp; callback, <span class="keyword">const</span> acknowledgement_callback_t&amp; acknowledgement_callback = <span class="keyword">nullptr</span>);</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;  <a class="code" href="classcpp__redis_1_1subscriber.html">subscriber</a>&amp; <a class="code" href="classcpp__redis_1_1subscriber.html#a52605edb2a85d3706