updated method
Calls Element.didChangeDependencies of all dependent elements, if InheritedWidget.updateShouldNotify returns true.
Called by update, immediately prior to build.
Calls notifyClients to actually trigger the notifications.
Implementation
@override
void updated(InheritedWidget oldWidget) {
super.updated(oldWidget);
if (_updatedShouldNotify) {
notifyClients(oldWidget);
}
}