toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (accessInfo != null) 'accessInfo': accessInfo!,
if (etag != null) 'etag': etag!,
if (id != null) 'id': id!,
if (kind != null) 'kind': kind!,
if (layerInfo != null) 'layerInfo': layerInfo!,
if (recommendedInfo != null) 'recommendedInfo': recommendedInfo!,
if (saleInfo != null) 'saleInfo': saleInfo!,
if (searchInfo != null) 'searchInfo': searchInfo!,
if (selfLink != null) 'selfLink': selfLink!,
if (userInfo != null) 'userInfo': userInfo!,
if (volumeInfo != null) 'volumeInfo': volumeInfo!,
};