putAll method Null safety

Future<void> putAll(
  1. Iterable products
)

Implementation

Future<void> putAll(final Iterable<Product> products) async {
  final Map<String, Product> upserts = <String, Product>{};
  for (final Product product in products) {
    upserts[product.barcode!] = product;
  }
  await _getBox().putAll(upserts);
}