docs: public AlbumArt requestArtworkFrom(final DataReference artReference, final CdjStatus.TrackType trackType) {
          ensureRunning();
          AlbumArt artwork = findArtInMemoryCaches(artReference);  // First check the in-memory artwork caches.
          if (artwork == null) {
              artwork = requestArtworkInternal(artReference, trackType, false);
          }
          return artwork;
      }