images method
Returns the cover images of playlistId
Implementation
Future<Iterable<Image>> images(String playlistId) async {
assert(playlistId.isNotEmpty, 'PlaylistId cannot be empty');
var jsonString = await _api._get('v1/playlists/$playlistId/images');
final items = json.decode(jsonString) as Iterable<dynamic>;
return items.map((item) => Image.fromJson(item));
}