at the given <code>index</code> in the list
or throws a <a href="dart-core/RangeError-class.html">RangeError</a> if <code>index</code> is out of bounds.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">Node operator [](int index) {
  if (JS(&quot;bool&quot;, &quot;# &gt;&gt;&gt; 0 !== # || # &gt;= #&quot;, index, index, index, length))
    throw new RangeError.index(index, thi