return 0;
TreePath path = getPathForRow(i); r.setBounds(0,0,0,0); r = getBounds(path, r); if (r.x + r.width > maximalWidth) maximalWidth = r.x + r.width;    invalidatePathBounds(path); } return maximalWidth;
	public int getPreferredWidth(Rectangle value0)      throws NotImplementedException	{		return 0; // TODO	}