/p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">E elementAt(int index) {
  ArgumentError.checkNotNull(index, &quot;index&quot;);
  RangeError.checkNotNegative(index, &quot;index&quot;);
  int elementIndex = 0;
  for (E element in this) {
    if (index == elementIndex) return element;
    elementIndex++;
  }
  throw new RangeError.index(index, this, &quot;index&quot;, null, el