toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'duration': duration,
'title': title,
'performer': performer,
'file_name': fileName,
'mime_type': mimeType,
'album_cover_minithumbnail': albumCoverMinithumbnail?.toJson(),
'album_cover_thumbnail': albumCoverThumbnail?.toJson(),
'external_album_covers': externalAlbumCovers
.map((item) => item.toJson())
.toList(),
'audio': audio?.toJson(),
'@type': constructor,
};