PageVisibilityObserver-class.html#constructors">Constructors</a></li>
    <li><a href="../../page_visibility/PageVisibilityObserver/PageVisibilityObserver.html">PageVisibilityObserver</a></li>


    <li class="section-title inherited">
      <a href="../../page_visibility/PageVisibilityObserver-class.html#instance-properties">Properties</a>
    </li>
    <li class="inherited"><a href="https://api.flutter.dev/flutter/dart-core/Object/hashCode.html">hashCode</a></li>
    <li class="inherited"><a href="https:/