code: public function seek($row = 1)
      {
          if (($row < $this->startRow) || ($row > $this->endRow)) {
              throw new PhpSpreadsheetException("Row $row is out of range ({$this->startRow} - {$this->endRow})");
          }
          $this->position = $row;
  
          return $this;
      }
docs: Set the row pointer to the selected row.
  
  @param int $row The row number to set the current pointer at
  
  @throws PhpSpreadsheetException
  
  @return RowIterator