x itself.</p>
    </section>
    
    <section>
      <dl class="dl-horizontal">
        <dt>Inheritance</dt>
        <dd><ul class="gt-separated dark clazz-relationships">
          <li><a href="../dart-core/Object-class.html">Object</a></li>
          <li><a href="../dart-core/Error-class.html">Error</a></li>
          <li><a href="../dart-core/ArgumentError-class.html">ArgumentError</a></li>
          <li>IndexError</li>
        </ul></dd>

        <dt>Implemented types</dt>
        <dd>
          <ul cl