   <dt id="EngineLayer">
          <span class="name "><a href="dart-ui/EngineLayer-class.html">EngineLayer</a></span>         
        </dt>
        <dd>
          A handle for the framework to hold and retain an engine layer across frames.
        </dd>
        <dt id="FontWeight">
          <span class="name "><a href="dart-ui/FontWeight-class.html">FontWeight</a></span>         
        </dt>
        <dd>
          The thickness of the glyphs used to draw the text
        </dd>
        <dt id="FrameInfo