private function getCellXml(array $row, Style $style)
    {
        $cellXml = '';
        foreach (array_values($row) as $cellIndex => $cellValue) {
            $this->updateColumnWidths($cellValue, $cellIndex, $style->getFont());
            $cellXml .= $this->cellBuilder->build(
                $this->rowIndex, $cellIndex, $cellValue, $style->getId()
            );
        }

        return $cellXml;
    }