WidgetsBindingObserver</code>, for a mechanism to observe the lifecycle state
from the widgets layer.</li></ul>
    </section>
    

    <section class="summary offset-anchor" id="constants">
      <h2>Constants</h2>

      <dl class="properties">
        <dt id="inactive" class="constant">
          <span class="name ">inactive</span>
          <span class="signature">&#8594; const <a href="dart-ui/AppLifecycleState-class.html">AppLifecycleState</a></span>
                  </dt>
        <dd>
          <p>