toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (createTime != null) 'createTime': createTime!,
if (helpLink != null) 'helpLink': helpLink!,
if (holder != null) 'holder': holder!,
if (name != null) 'name': name!,
if (origin != null) 'origin': origin!,
};