ot reachable from the root after an update,
the node will be discarded from the tree.</p>
<p>The <code>flags</code> are a bit field of <a href="dart-ui/SemanticsFlag-class.html">SemanticsFlag</a>s that apply to this node.</p>
<p>The <code>actions</code> are a bit field of <a href="dart-ui/SemanticsAction-class.html">SemanticsAction</a>s that can be undertaken
by this node. If the user wishes to undertake one of these actions on this
node, the <a href="dart-ui/Window/onSemanticsAction.html">Window.onSemantic