or</a></li>
      <li><a href="dart-core/StateError-class.html">StateError</a></li>
      <li><a href="dart-core/TypeError-class.html">TypeError</a></li>
      <li><a href="dart-core/UnimplementedError-class.html">UnimplementedError</a></li>
      <li><a href="dart-core/UnsupportedError-class.html">UnsupportedError</a></li>
    </ol>
  </div>

  <div id="dartdoc-main-content" class="col-xs-12 col-sm-9 col-md-8 main-content">
      <div><h1>BidirectionalIterator&lt;<wbr><span class="type-parameter">E</span>&