toJson method

Implementation

Map<String, dynamic> toJson() => {
  "tierId": tierId == null ? null : tierId,
  "digital": digital == null ? null : digital,
  "physical": physical == null ? null : physical,
  "adFree": adFree == null ? null : adFree,
  "title": title == null ? null : title,
  "renew": renew == null ? null : renew,
  "duration": duration == null ? null : duration,
  "durationText": durationText == null ? null : durationText,
};