toJson method Null safety

Map<String, dynamic> toJson()

Implementation

Map<String, dynamic> toJson() => {
      'volume': volume,
      'chapter': chapter,
      'title': title,
      'translatedLanguage': translatedLanguage,
      'externalUrl': externalUrl,
      'publishAt': publishAt,
      'readableAt': readableAt,
      'createdAt': createdAt,
      'updatedAt': updatedAt,
      'pages': pages.toString(),
      'version': version.toString(),
    };