t"><span class="identifier">get_lowest_layer</span></code>,
                <code class="computeroutput"><span class="identifier">lowest_layer_type</span></code>
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">close_socket</span></code>, <code class="computeroutput"><span class="identifier">beast_close_socket</span></code>
              </li>
<li class="listitem">
                <code class="computeroutput"><span class="identifier">error</span