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

    public function render()
    {
        // Create XML writer
        $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
        // XML header
        $objWriter->startDocument('1.0', 'UTF-8', 'yes');
        // Properties
        $objWriter->startElement('Properties');
        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/officeDocument/2006/custom-properties');
        $objWriter->writeAttribute('xmlns:vt', 'http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes');
        if ($this->getPresentation()->getPresentationProperties()->isMarkedAsFinal()) {
            // property
            $objWriter->startElement('property');
            $objWriter->writeAttribute('fmtid', '{D5CDD505-2E9C-101B-9397-08002B2CF9AE}');
            $objWriter->writeAttribute('pid', 2);
            $objWriter->writeAttribute('name', '_MarkAsFinal');
            // property > vt:bool
            $objWriter->writeElement('vt:bool', 'true');
            // > property
            $objWriter->endElement();
        }
        // > Properties
        $objWriter->endElement();
        $this->oZip->addFromString('docProps/custom.xml', $objWriter->getData());
        // Return
        return $this->oZip;
    }