ial">(</span>
    <span class="identifier">header</span><span class="special">&lt;</span> <span class="identifier">isRequest</span><span class="special">,</span> <span class="identifier">Fields</span> <span class="special">&gt;&amp;</span> <span class="identifier">h</span><span class="special">,</span>
    <span class="identifier">value_type</span><span class="special">&amp;</span> <span class="identifier">b</span><span class="special">);</span>
</pre>
<h6>
<a name="beast.ref.boost__beast__http__basic_file_