ounds.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">SourceBuffer operator [](int index) {
  if (JS(&quot;bool&quot;, &quot;# &gt;&gt;&gt; 0 !== # || # &gt;= #&quot;, index, index, index, length))
    throw new RangeError.index(index, this);
  return JS(&quot;SourceBuffer&quot;, &quot;#[#]&quot;, this, index);
}</code></pre>
    </section>

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