lass="kind-property">onPlatformBrightnessChanged</span> property</h1></div>


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        <section class="multi-line-signature">
          <span class="returntype"><a href="../../dart-ui/VoidCallback.html">VoidCallback</a></span>
                  <span class="name ">onPlatformBrightnessChanged</span>
          
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                <section class="desc markdown">
          <p>A callback that is invoked whenever <a href="../../dart-ui/Window/platformBrightne