UpdateChatPhoto.fromJson constructor
Parse from a json
Implementation
factory UpdateChatPhoto.fromJson(Map<String, dynamic> json) =>
    UpdateChatPhoto(
      chatId: json['chat_id'],
      photo: json['photo'] == null
          ? null
          : ChatPhotoInfo.fromJson(json['photo']),
      extra: json['@extra'],
      clientId: json['@client_id'],
    );