buildF method
Implement this function instead of the build() function so to utilize a built-in FutureBuilder Widget and InheritedWidget. Not, it's already implemented in mixin FutureBuilderStateMixin
Implementation
@override
Widget buildF(BuildContext context) => _useInherited
? _StateXInheritedWidget(
key: ValueKey<StateX>(this),
state: this,
child: _child ??= buildIn(context),
)
: buildIn(context);