
            <span class="identifier">Fields</span><span class="special">&gt;</span>
            <span class="keyword">const</span><span class="special">&amp;</span></code>.
          </li>
<li class="listitem">
            <code class="computeroutput"><span class="identifier">v</span></code> denotes a possibly
            const value of type <code class="computeroutput"><span class="identifier">Body</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">&amp;</