public function protectCellsByColumnAndRow($columnIndex1, $row1, $columnIndex2, $row2, $password, $alreadyHashed = false)
    {
        $cellRange = Coordinate::stringFromColumnIndex($columnIndex1) . $row1 . ':' . Coordinate::stringFromColumnIndex($columnIndex2) . $row2;

        return $this->protectCells($cellRange, $password, $alreadyHashed);
    }
public function protectCellsByColumnAndRow($columnIndex1, $row1, $columnIndex2, $row2, $password, $alreadyHashed = false)
    {
        $cellRange = Coordinate::stringFromColumnIndex($columnIndex1) . $row1 . ':' . Coordinate::stringFromColumnIndex($columnIndex2) . $row2;

        return $this->protectCells($cellRange, $password, $alreadyHashed);
    }
Set protection on a cell range by using numeric cell coordinates.

@param int $columnIndex1 Numeric column coordinate of the first cell
@param int $row1 Numeric row coordinate of the first cell
@param int $columnIndex2 Numeric column coordinate of the last cell
@param int $row2 Numeric row coordinate of the last cell
@param string $password Password to unlock the protection
@param bool $alreadyHashed If the password has already been hashed, set this to true

@return Worksheet