UpdateChatIsMarkedAsUnread.fromJson constructor
Parse from a json
Implementation
factory UpdateChatIsMarkedAsUnread.fromJson(Map<String, dynamic> json) =>
    UpdateChatIsMarkedAsUnread(
      chatId: json['chat_id'],
      isMarkedAsUnread: json['is_marked_as_unread'],
      extra: json['@extra'],
      clientId: json['@client_id'],
    );