class Statistic { int? sid; int? play; int? collect; int? comment; int? share; Statistic({this.sid, this.play, this.collect, this.comment, this.share}); factory Statistic.fromJson(Map json) => Statistic( sid: json['sid'] as int?, play: json['play'] as int?, collect: json['collect'] as int?, comment: json['comment'] as int?, share: json['share'] as int?, ); }