throw new Error ("Not implemented");
if (orientation == SwingConstants.VERTICAL) return rowHeight; else { int sum = 0; for (int i = 0; i < getColumnCount(); ++i) sum += columnModel.getColumn(0).getWidth(); return getColumnCount() == 0 ? 10 : sum / getColumnCount(); }
  public int getScrollableUnitIncrement (Rectangle visibleRect, int orientation, int direction)  {    throw new Error ("Not implemented");  }