build method
Subclasses should override this function to actually call the appropriate
build
function (e.g., StatelessWidget.build or State.build) for
their widget.
Implementation
@override
Widget build() {
var fRWidget = widget as FRStatefulWidget;
var time = BuildTimePoint(fRWidget._viewModel.name,
fRWidget.runtimeType.toString(), fRWidget._viewModel.context);
time.start();
var result = super.build();
time.end();
return result;
}