toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (buyLink != null) 'buyLink': buyLink!,
if (country != null) 'country': country!,
if (isEbook != null) 'isEbook': isEbook!,
if (listPrice != null) 'listPrice': listPrice!,
if (offers != null) 'offers': offers!,
if (onSaleDate != null) 'onSaleDate': onSaleDate!,
if (retailPrice != null) 'retailPrice': retailPrice!,
if (saleability != null) 'saleability': saleability!,
};