toJson method
Implementation
Map<String, dynamic> toJson() => {
if (token != null) "token": token,
if (topic != null) "topic": topic,
if (condition != null) "condition": condition,
if (notification != null) "notification": notification?.toJson(),
if (data != null) "data": data,
if (android != null) "android": android?.toJson(),
if (apns != null) "apns": apns?.toJson(),
if (webpush != null) "webpush": webpush?.toJson(),
};