tifier">get_lowest_layer</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
          with <code class="computeroutput"><span class="identifier">get_lowest_layer</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>.
        </li>
</ul></div>
<h4>
<a name="beast.release_notes.h4"></a>
      <span class="phrase"><a name="beast.release_notes.boost_1_66"