toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (appSparkVersion != null) 'appSparkVersion': appSparkVersion!,
if (attemptId != null) 'attemptId': attemptId!,
if (completed != null) 'completed': completed!,
if (durationMillis != null) 'durationMillis': durationMillis!,
if (endTime != null) 'endTime': endTime!,
if (lastUpdated != null) 'lastUpdated': lastUpdated!,
if (sparkUser != null) 'sparkUser': sparkUser!,
if (startTime != null) 'startTime': startTime!,
};