@Override
    public Class getColumnClass(int col) {
      if (col == 0) {
        return Boolean.class;
      }
      if (col == 1) {
        return String.class;
      }
      if (col == 2) {
        return String.class;
      }
      throw new IllegalArgumentException(String.valueOf(col));
    }
@Override
    public Class getColumnClass(int col)