toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'star_count': starCount,
'transaction_id': transactionId,
'boosted_chat_id': boostedChatId,
'giveaway_message_id': giveawayMessageId,
'is_unclaimed': isUnclaimed,
'sticker': sticker?.toJson(),
'@type': constructor,
};