toJson method
Implementation
Map<String, dynamic> toJson() {
final endTime = this.endTime;
final startTime = this.startTime;
final timezone = this.timezone;
return {
if (endTime != null) 'EndTime': iso8601ToJson(endTime),
if (startTime != null) 'StartTime': iso8601ToJson(startTime),
if (timezone != null) 'Timezone': timezone,
};
}