PhpOffice\PhpPresentation\Writer\PowerPoint2007\PptComments::render PHP Method

    public function render()
    {
        foreach ($this->getPresentation()->getAllSlides() as $numSlide => $oSlide) {
            $contentXml = $this->writeSlideComments($oSlide);
            if (empty($contentXml)) {
                continue;
            }
            $this->getZip()->addFromString('ppt/comments/comment' . ($numSlide + 1) . '.xml', $contentXml);
        }
        return $this->getZip();
    }