toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'currency': currency,
'amount': amount,
'star_count': starCount,
'store_product_id': storeProductId,
'yearly_boost_count': yearlyBoostCount,
'winner_options': winnerOptions.map((item) => item.toJson()).toList(),
'is_default': isDefault,
'is_additional': isAdditional,
'@type': constructor,
};