Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/ColumnCellIterator.php
public function next()
    {
        do {
            ++$this->currentRow;
        } while (($this->onlyExistingCells) &&
            (!$this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $this->currentRow)) &&
            ($this->currentRow <= $this->endRow));
    }
public function next()
    {
        do {
            ++$this->currentRow;
        } while (($this->onlyExistingCells) &&
            (!$this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $this->currentRow)) &&
            ($this->currentRow <= $this->endRow));
    }
Set the iterator to its next value.