toJson method
Implementation
Map<String, Object> toJson() => {
if (id.isNotEmpty) 'id': id,
if (status.isNotEmpty) 'status': status,
if (code.isNotEmpty) 'code': code,
if (title.isNotEmpty) 'title': title,
if (detail.isNotEmpty) 'detail': detail,
if (source.isNotEmpty) 'source': source,
if (links.isNotEmpty) 'links': links,
if (meta.isNotEmpty) 'meta': meta,
};