# addItem method Null safety

1. @override

DocumentModel addItem(

1. DocumentModel model,
2. DocumentItemModel newItem

)
override

## Implementation

    @override
    DocumentModel addItem(DocumentModel model, DocumentItemModel newItem) {
      List<DocumentItemModel> newItems =
          model.images == null ? [] : model.images!;
      newItems.add(newItem);
      var newModel = model.copyWith(images: newItems);
      return newModel;
    }