n><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">null_buffers</span><span class="special">(),</span> <span class="special">*</span><span class="keyword">this</span><span class="special">);</span>
          <span class="keyword">return</span><span class="special">;</span>
        <span class="special">}</span>

        <span class="keyword">if</span> <span class="special">(</span><span class="identifier">ec</span> <span class="specia