I've discovered that Spotify will not return an empty list of images but rather null when there is no image set for a playlist. This can be tested by creating a playlist and only adding local tracks, or perhaps by simply creating a playlist without any image or track (haven't tested the latter).
I've discovered that Spotify will not return an empty list of images but rather
null
when there is no image set for a playlist. This can be tested by creating a playlist and only adding local tracks, or perhaps by simply creating a playlist without any image or track (haven't tested the latter).