UniqueWidget<T extends State<StatefulWidget> > constructor
Null safety
- {required GlobalKey<
T> key}
Creates a widget that has exactly one inflated instance in the tree.
The key
argument must not be null because it identifies the unique
inflated instance of this widget.
Implementation
const UniqueWidget({
required GlobalKey<T> key,
}) : assert(key != null),
super(key: key);