 HTTP protocol specification and belongs elsewhere.
          </li>
<li class="listitem">
            The use of <code class="computeroutput"><span class="identifier">string_type</span></code>
            (a customization point) for source, destination, and body suggests that
            <code class="computeroutput"><span class="identifier">string_type</span></code> models a
            <span class="bold"><strong>ForwardRange</strong></span> whose <code class="computeroutput"><span class="identifier">value_