sio</span><span class="special">::</span><span class="identifier">socket_base</span><span class="special">::</span><span class="identifier">send_low_watermark</span> <span class="identifier">option</span><span class="special">;</span>
<span class="identifier">socket</span><span class="special">.</span><span class="identifier">get_option</span><span class="special">(</span><span class="identifier">option</span><span class="special">);</span>
<span class="keyword">int</span> <span class="identifier">size</spa