@Override
  public void setShowVerticalLines(boolean showVerticalLines) {
    if (!showVerticalLines) {
      getColumnModel().setColumnMargin(0);
      setIntercellSpacing(new Dimension(0, getIntercellSpacing().height));
    }
    super.setShowVerticalLines(showVerticalLines);
  }
@Override
  public void setShowVerticalLines(boolean showVerticalLines)