of<T extends ChangeNotifier> method
T
of<T extends ChangeNotifier>()
Create a dependency with a Registrar widget with location
param set and a model of type T
.
Same idea as the "of" feature of Provider.of, Theme.of, etc. For no dependency, use get.
Performs a lazy initialization if necessary. An exception is thrown if T
is not a ChangeNotifier.
Implementation
T of<T extends ChangeNotifier>() {
final _RegistrarInheritedWidget<T>? inheritedWidget =
dependOnInheritedWidgetOfExactType<_RegistrarInheritedWidget<T>>();
if (inheritedWidget == null) {
throw Exception(
'BuildContext.of<T>() did not find inherited widget Registrar<$T>(inherited: true)');
}
return inheritedWidget.instance;
}