public void layout() {
		if (table == null || table.isDisposed())
			return;
		if (item == null || item.isDisposed())
			return;
		int columnCount = table.getColumnCount();
		if (columnCount == 0 && column != 0)
			return;
		if (columnCount > 0 && (column < 0 || column >= columnCount))
			return;
		super.layout();
	}