toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (kind != null) 'kind': kind!,
if (orderId != null) 'orderId': orderId!,
if (purchaseTimeMillis != null)
'purchaseTimeMillis': purchaseTimeMillis!,
if (purchaseToken != null) 'purchaseToken': purchaseToken!,
if (voidedQuantity != null) 'voidedQuantity': voidedQuantity!,
if (voidedReason != null) 'voidedReason': voidedReason!,
if (voidedSource != null) 'voidedSource': voidedSource!,
if (voidedTimeMillis != null) 'voidedTimeMillis': voidedTimeMillis!,
};