Convenient flutter methods.

animation_functions.dart

      /// After 0.5 second after creating, the list will slide down
    /// to the bottom of the ListView
  void _animateSlideDown(Model model) {
    Timer(
        Duration(milliseconds: 400),
        () => model.scrollController.animateTo(
              model.scrollController.position.maxScrollExtent,
              duration: Duration(milliseconds: 500),
              curve: Curves.fastOutSlowIn,
            ));
  }