<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="keyword">unsigned</span> <span class="keyword">char</span><span class="special">&gt;</span> <span class="special">&amp;</span><span class="identifier">body_data</span><span class="special">);</span>

    <span class="comment">/// Defines a stream that will be relied on to provide the body of the HTTP message when it is</span>