latformBrightnessChanged =&gt; _onPlatformBrightnessChanged;</code></pre>
        </section>
</section>
        
        <section id="setter">
        
        <section class="multi-line-signature">
          <span class="returntype">void</span>
                    <span class="name ">onPlatformBrightnessChanged=</span>
<span class="signature">(<wbr><span class="parameter" id="onPlatformBrightnessChanged=-param-callback"><span class="type-annotation"><a href="../../dart-ui/VoidCallback.html">VoidCallback</a