toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'chat_id': chatId,
'topic_id': topicId?.toJson(),
'from_chat_id': fromChatId,
'message_ids': messageIds.map((item) => item).toList(),
'options': options?.toJson(),
'send_copy': sendCopy,
'remove_caption': removeCaption,
'@type': constructor,
};