 create a SemanticsUpdate object, use a <a href="dart-ui/SemanticsUpdateBuilder-class.html">SemanticsUpdateBuilder</a>.</p>
<p>Semantics updates can be applied to the system's retained semantics tree
using the <a href="dart-ui/Window/updateSemantics.html">Window.updateSemantics</a> method.</p>
    </section>
    


    <section class="summary offset-anchor inherited" id="instance-properties">
      <h2>Properties</h2>

      <dl class="properties">
        <dt id="hashCode" class="property inherited">
     