/a> or <a href="dart-async/Completer/completeError.html">completeError</a> must be done at most once.</p>
<p>All listeners on the future are informed about the value.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">void complete([FutureOr&lt;T&gt; value]);</code></pre>
    </section>

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