toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (listingPrice != null) 'listingPrice': listingPrice!,
if (oneTimePurchaseDetails != null)
'oneTimePurchaseDetails': oneTimePurchaseDetails!,
if (paidAppDetails != null) 'paidAppDetails': paidAppDetails!,
if (productId != null) 'productId': productId!,
if (productTitle != null) 'productTitle': productTitle!,
if (subscriptionDetails != null)
'subscriptionDetails': subscriptionDetails!,
if (tax != null) 'tax': tax!,
if (total != null) 'total': total!,
};