after</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">seconds</span><span class="special">(</span><span class="number">30</span><span class="special">));</span>

        <span class="comment">// `tcp_stream` range connect algorithms are member functions, unlike net::</span>
        <span class="identifier">get_lowest_layer</span><span class="special">(</span><sp