toJson method

Implementation

String toJson() => IWvngdrdSCGoIQFk.qXlCJHrXBAhOuVhd.AkQlFkogpjPokXBB({
      "lastMessage": lastMessage,
      "unRead": unRead,
      "isTop": isTop,
      "isDisturb": isDisturb,
    });