@Override
    public int getNextVisualPositionFrom(JTextComponent t, int pos, Position.Bias b,
                                         int direction,
                                         Position.Bias[] biasRet) {
      notSupported();
      return 0;
    }
@Override
    public int getNextVisualPositionFrom(JTextComponent t, int pos, Position.Bias b,
                                         int direction,
                                         Position.Bias[] biasRet)