anchor.diff:  , jinja2
   , mock
   , mp3val
  -, mpd
   , munkres
   , musicbrainzngs
   , mutagen
  
positive.code:     fetchart = requests != null;
      lastgenre = pylast != null;
      lastimport = pylast != null;
      mpdstats = mpd != null;
      mpdupdate = mpd != null;
      replaygain = bs1770gain != null;
      thumbnails = pyxdg != null;
      web = flask != null;
  
negative.code:     jinja2
      mock
      mp3val
      munkres
      musicbrainzngs
      mutagen
  