toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'chat_id': chatId,
'topic_id': topicId?.toJson(),
'query': query,
'sender_id': senderId?.toJson(),
'from_message_id': fromMessageId,
'offset': offset,
'limit': limit,
'filter': filter?.toJson(),
'@type': constructor,
};