# addItem method Null safety

1. @override

BookletModel addItem(

1. BookletModel model,
2. SectionModel newItem

)
override

## Implementation

    @override
    BookletModel addItem(BookletModel model, SectionModel newItem) {
      List<SectionModel> newItems =
          model.sections == null ? [] : model.sections!.map((e) => e).toList();
      newItems.add(newItem);
      var newModel = model.copyWith(sections: newItems);
      return newModel;
    }