de class="prettyprint lang-dart">RangeError</code> if <code class="prettyprint lang-dart">index</code> is out of bounds.</p>
    
    </section>

    <section class="summary source-code" id="source">
      <h2>Source</h2>
      <pre><code class="prettyprint lang-dart">MimeType operator[](int index) {
  if (index &lt; 0 || index &gt;= length)
    throw new RangeError.index(index, this);
  return wrap_jso(_blink.BlinkMimeTypeArray.instance.item_Callback_1_(unwrap_jso(this), index));
}</code></pre>
    </secti