toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (endTime != null) 'endTime': endTime!,
if (expireTime != null) 'expireTime': expireTime!,
if (name != null) 'name': name!,
if (space != null) 'space': space!,
if (startTime != null) 'startTime': startTime!,
};