hut down the underlying
        connection before returning. In this case, the read operation will complete
        with the code <a class="link" href="../ref/boost__beast__websocket__error.html" title="websocket::error"><code class="computeroutput"><span class="identifier">error</span><span class="special">::</span><span class="identifier">closed</span></code></a>. This indicates to the caller
        that the connection has been closed cleanly.
      </p>
<div class="important"><table border="0" summary="