toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (languageCode != null) 'languageCode': languageCode!,
if (publisher != null) 'publisher': publisher!.toJson(),
if (reviewDate != null) 'reviewDate': reviewDate!,
if (textualRating != null) 'textualRating': textualRating!,
if (title != null) 'title': title!,
if (url != null) 'url': url!,
};