ui/SceneBuilder-class.html">SceneBuilder</a> API and the
<a href="../dart-ui/Window/render.html">render</a> method. When possible, this is driven by the hardware VSync
signal. This is only called if <a href="../dart-ui/Window/scheduleFrame.html">scheduleFrame</a> has been called since the
last time this callback was invoked. <a href="../dart-ui/Window/onBeginFrame.html">[...]</a>
                  <div class="features">read / write</div>
</dd>
        <dt id="onDrawFrame" class="property">
          <span c