toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (appId != null) 'appId': appId!,
if (appInstanceId != null) 'appInstanceId': appInstanceId!,
if (appType != null) 'appType': appType!,
if (runningDuration != null) 'runningDuration': runningDuration!,
};