toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'chat_id': chatId,
'bot_user_id': botUserId,
'web_app_short_name': webAppShortName,
'start_parameter': startParameter,
'allow_write_access': allowWriteAccess,
'parameters': parameters?.toJson(),
'@type': constructor,
};