Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/Row.php
public function getCellIterator($startColumn = 'A', $endColumn = null)
    {
        return new RowCellIterator($this->worksheet, $this->rowIndex, $startColumn, $endColumn);
    }
public function getCellIterator($startColumn = 'A', $endColumn = null)
    {
        return new RowCellIterator($this->worksheet, $this->rowIndex, $startColumn, $endColumn);
    }
Get cell iterator.

@param string $startColumn The column address at which to start iterating
@param string $endColumn Optionally, the column address at which to stop iterating

@return RowCellIterator