toJson method

Implementation

core.Map<core.String, core.dynamic> toJson() {
  final author = this.author;
  final processingState = this.processingState;
  final title = this.title;
  final volumeId = this.volumeId;
  return {
    'author': ?author,
    'processingState': ?processingState,
    'title': ?title,
    'volumeId': ?volumeId,
  };
}