span><span class="special">,</span> <span class="string">"W.C. Handy"</span><span class="special">);</span>

<span class="comment">// Write the next chunk with the chunk extensions</span>
<span class="comment">// The implementation will make a copy of the extensions object,</span>
<span class="comment">// so the caller does not need to manage lifetime issues.</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span cl