eplaces the current handler set by the invocation of
<a href="dart-async/Stream/listen.html">Stream.listen</a>, by calling <a href="dart-async/StreamSubscription/asFuture.html">asFuture</a>, or by a previous call to <a href="dart-async/StreamSubscription/onDone.html">onDone</a>.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">void onDone(void handleDone());</code></pre>
    <