code: private void addPermanent(IzouSoundLineBaseClass izouSoundLine) {
          debug("adding " + izouSoundLine + " to permanent");
          if (!izouSoundLine.isPermanent())
              izouSoundLine.setToPermanent();
          synchronized (permanentUserReadWriteLock) {
              endWaitingForUsage();
              if (permanentLines == null) {
                  permanentLines = Collections.synchronizedList(new ArrayList<>());
              }
              permanentLines.add(new WeakReference<>(izouSoundLine));
          }
          //TODO: STOP the addon via the stop event
      }
docs: adds the IzouSoundLine as permanent
  @param izouSoundLine the izouSoundLine to add