toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'sticker_type': stickerType?.toJson(),
'emojis': emojis,
'query': query,
'input_language_codes': inputLanguageCodes.map((item) => item).toList(),
'offset': offset,
'limit': limit,
'@type': constructor,
};