toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (messageBytes != null) 'messageBytes': messageBytes!,
if (messageCount != null) 'messageCount': messageCount!,
if (minimumEventTime != null) 'minimumEventTime': minimumEventTime!,
if (minimumPublishTime != null)
'minimumPublishTime': minimumPublishTime!,
};