kup or connection failed.</p>
<p><code>host</code> can either be a <a href="dart-core/String-class.html">String</a> or an <a href="dart-io/InternetAddress-class.html">InternetAddress</a>. If <code>host</code> is a
<a href="dart-core/String-class.html">String</a>, <a href="dart-io/RawSocket/connect.html">connect</a> will perform a <a href="dart-io/InternetAddress/lookup.html">InternetAddress.lookup</a> and try
all returned <a href="dart-io/InternetAddress-class.html">InternetAddress</a>es, until connected. U