.html">[...]</a>
                  <div class="features">read / write</div>
</dd>
        <dt id="onBeginFrame" class="property">
          <span class="name"><a href="../dart-ui/Window/onBeginFrame.html">onBeginFrame</a></span>
          <span class="signature">&#8596; <a href="../dart-ui/FrameCallback.html">FrameCallback</a></span>         
        </dt>
        <dd>
          A callback that is invoked to notify the application that it is an
appropriate time to provide a scene using the <a href="../dart-