toJson method
Implementation
Map<String, dynamic> toJson() => {
"priceAmountMicros": priceAmountMicros,
"priceCurrencyCode": priceCurrencyCode,
"formattedPrice": formattedPrice,
"billingPeriod": billingPeriod,
"recurrenceMode": recurrenceMode,
"billingCycleCount": billingCycleCount,
};