a>
                    (a layer that allows websocket communication over a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">iostream</span></code>).
                  </p>
<p>
                    In contrast, Beast abstracts the transport by defining just one
                    <span class="bold"><strong><code class="computeroutput"><span class="identifier">NextLayer</span></code></strong></span>
                    template argument Th