n class="desc markdown">
    
          <p>Static factory designed to expose <code class="prettyprint lang-dart">keyerror</code> events to event
handlers that are not necessarily instances of <a href="polymer_app_layout/MediaElement-class.html">MediaElement</a>.</p>
<p>See <a href="polymer_app_layout/EventStreamProvider-class.html">EventStreamProvider</a> for usage information.</p>
    
    </section>

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