@Override
  public void clearCaches() {
    super.clearCaches();
    synchronized (this) {
      FileSystem fs = dereference(myFileSystem);
      if (fs != null) {
        myFileSystem = null;
        try {
          fs.close();
        }
        catch (Exception e) {
          Logger.getInstance(JrtHandler.class).info(e);
        }
      }
    }
  }
@Override
  public void clearCaches()