;</code>.</p>
<p>The list must be non-empty.</p>
</section>
<section class="summary source-code" id="source">
  <h2><span>Implementation</span> </h2>
  <pre class="language-dart"><code class="language-dart">void set first(E value) {
  if (length == 0) throw IterableElementError.noElement();
  this[0] = value;
}</code></pre>
</section>
</section>
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