toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (lastAuthor != null) 'lastAuthor': lastAuthor!,
if (name != null) 'name': name!,
if (notebookUpdateTime != null)
'notebookUpdateTime': notebookUpdateTime!,
if (service != null) 'service': service!,
};