       <section class="multi-line-signature">
          <span class="returntype"><a href="dart-core/Duration-class.html">Duration</a></span>
                  <span class="name ">buildDuration</span>
          
</section>
        
                <section class="desc markdown">
          <p>The duration to build the frame on the UI thread.</p>
<p>The build starts approximately when <a href="dart-ui/Window/onBeginFrame.html">Window.onBeginFrame</a> is called. The
<a href="dart-core/Duration-class.html">Durat