Book constructor

const Book({
  1. required String id,
  2. String? etag,
  3. required BookInfo info,
  4. Uri? selfLink,
  5. required SaleInfo saleInfo,
})

Implementation

const Book({
  required this.id,
  this.etag,
  required this.info,
  this.selfLink,
  required this.saleInfo,
});