toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (labelFilterAction != null) 'labelFilterAction': labelFilterAction!,
if (labelFilterBehavior != null)
'labelFilterBehavior': labelFilterBehavior!,
if (labelIds != null) 'labelIds': labelIds!,
if (topicName != null) 'topicName': topicName!,
};