def artists(self): return CallbackIterator(self.num_artists, self.artist)
def tracks(self): return CallbackIterator(self.num_tracks, self.track)
def playlists(self): return CallbackIterator(self.num_playlists, self.playlist)
def albums(self): return CallbackIterator(self.num_albums, self.album)
def similar_artists(self): return CallbackIterator(self.num_similar_artists, self.similar_artists)
def portraits(self): return CallbackIterator(self.num_portraits, self.portrait)
def copyrights(self): return CallbackIterator(self.num_copyrights, self.copyright)