d. If <code>timeout</code> is longer than the system
level timeout duration, a timeout may occur sooner than specified in
<code>timeout</code>. On timeout, a <a href="dart-io/SocketException-class.html">SocketException</a> is thrown and all ongoing
connection attempts to <code>host</code> are cancelled.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span> </h2>
      <pre class="language-dart"><code class="language-dart">external static Future&l