ial">::</span><span class="identifier">details</span><span class="special">::</span><span class="identifier">_http_request</span><span class="special">;</span>
    <span class="keyword">friend</span> <span class="keyword">class</span> <span class="identifier">http</span><span class="special">::</span><span class="identifier">client</span><span class="special">::</span><span class="identifier">http_client</span><span class="special">;</span>

    <span class="identifier">std</span><span class="special">::</s