
clients.  Example values are "http/1.1" or "h2".  The selected protocol
can be obtained via <a href="dart-io/RawSecureSocket/selectedProtocol.html">RawSecureSocket.selectedProtocol</a>.</p>
<p>The optional argument <code>shared</code> specifies whether additional
RawSecureServerSocket objects can bind to the same combination of
<code>address</code>, <code>port</code> and <code>v6Only</code>.  If <code>shared</code> is <code>true</code> and more
<code>RawSecureServerSocket</code>s from this isolate or other