This function is used to extract a list of all containing user playlists for tracks in an Apple application. This list does not include Genius or Smart playlists. Lists are saved to a track variable and are delimited by a newline character (\n).
Playlist names are simple flat playlist names if the Qualified playlist names setting is not enabled. When the setting is enabled, the returned names follow the qualified formats specified in Apple App Playlist Naming Conventions.
The function only works on files which are linked.