class Score { final String playerId; final String matchId; final int roundNumber; int score = 0; int change = 0; Score({ required this.playerId, required this.matchId, required this.roundNumber, required this.score, required this.change, }); Score.fromJson(Map json) : playerId = json['playerId'], matchId = json['matchId'], roundNumber = json['roundNumber'], score = json['score'], change = json['change']; Map toJson() => { 'playerId': playerId, 'matchId': matchId, 'roundNumber': roundNumber, 'score': score, 'change': change, }; }