text: public CellRangeAddress(int firstRow, int lastRow, int firstCol, int lastCol) {super(firstRow, lastRow, firstCol, lastCol);if (lastRow < firstRow || lastCol < firstCol) {throw new IllegalArgumentException("Invalid cell range, having lastRow < firstRow || lastCol < firstCol, " +"had rows " + lastRow + " >= " + firstRow + " or cells " + lastCol + " >= " + firstCol);}}