src/main/java/org/intellimate/izou/sdk/frameworks/music/player/Playlist.java
public Playlist update(TrackInfo old, TrackInfo newTrackInfo) {
        List<TrackInfo> list = new ArrayList<>(queue);
        list.set(list.indexOf(old), newTrackInfo);
        return new Playlist(queue, name, playbackModes, position);
    }
public Playlist update(TrackInfo old, TrackInfo newTrackInfo) {
        List<TrackInfo> list = new ArrayList<>(queue);
        list.set(list.indexOf(old), newTrackInfo);
        return new Playlist(queue, name, playbackModes, position);
    }
updates the TrackInfo-Object
@param old the old TrackInfo
@param newTrackInfo the new TrackInfo
@return the resulting new Playlist