rrorCallback</a></li>
      <li><a href="dart-html/StorageQuotaCallback.html">StorageQuotaCallback</a></li>
      <li><a href="dart-html/StorageUsageCallback.html">StorageUsageCallback</a></li>
      <li><a href="dart-html/TimeoutHandler.html">TimeoutHandler</a></li>
      <li><a href="dart-html/VoidCallback.html">VoidCallback</a></li>
    
    </ol>
  </div>

  <div id="dartdoc-main-content" class="col-xs-12 col-sm-9 col-md-8 main-content">
      <div><h1><span class="kind-class">BackgroundFetchClickEvent<