Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/Comments.php
private function writeComment(XMLWriter $objWriter, $pCellReference, Comment $pComment, array $pAuthors)
    {
        // comment
        $objWriter->startElement('comment');
        $objWriter->writeAttribute('ref', $pCellReference);
        $objWriter->writeAttribute('authorId', $pAuthors[$pComment->getAuthor()]);

        // text
        $objWriter->startElement('text');
        $this->getParentWriter()->getWriterPart('stringtable')->writeRichText($objWriter, $pComment->getText());
        $objWriter->endElement();

        $objWriter->endElement();
    }
private function writeComment(XMLWriter $objWriter, $pCellReference, Comment $pComment, array $pAuthors)
    {
        // comment
        $objWriter->startElement('comment');
        $objWriter->writeAttribute('ref', $pCellReference);
        $objWriter->writeAttribute('authorId', $pAuthors[$pComment->getAuthor()]);

        // text
        $objWriter->startElement('text');
        $this->getParentWriter()->getWriterPart('stringtable')->writeRichText($objWriter, $pComment->getText());
        $objWriter->endElement();

        $objWriter->endElement();
    }
Write comment to XML format.

@param XMLWriter $objWriter XML Writer
@param string $pCellReference Cell reference
@param Comment $pComment Comment
@param array $pAuthors Array of authors

@throws \PhpOffice\PhpSpreadsheet\Writer\Exception