toJson method
Converts an object to JSON.
Implementation
@override
Map<String, dynamic> toJson() {
final returnValue = <String, dynamic>{
'\$hash': '99ea331d',
'\$name': 'StarGiftUpgradePrice',
'date': date.toIso8601String(),
'upgradeStars': upgradeStars,
};
// Finished toJson.
return returnValue;
}