movie_carousel_widget.dart

class MovieCarouselWidget extends StatelessWidget {
  //1
  final List<MovieEntity> movies;
  final int defaultIndex;
  
  //2
  const MovieCarouselWidget({
      Key key,
      @required this.movies,
      @required this.defaultIndex,
    })  : assert(defaultIndex >= 0, 'defaultIndex cannot be less than 0'),
          super(key: key);

  @override
  Widget build(BuildContext context) {
    //3
    return Column(
      children: [
        MovieAppBar(),
        //4
        MoviePageView(
          movies: movies,
          initialPage: defaultIndex,
        ),
      ],
    );
  }
}