PhpOffice\PhpPresentation\Writer\PowerPoint2007\AbstractSlide::writeShapeGroup PHP Method

    protected function writeShapeGroup(XMLWriter $objWriter, Group $group, &$shapeId)
    {
        // p:grpSp
        $objWriter->startElement('p:grpSp');
        // p:nvGrpSpPr
        $objWriter->startElement('p:nvGrpSpPr');
        // p:cNvPr
        $objWriter->startElement('p:cNvPr');
        $objWriter->writeAttribute('name', 'Group ' . $shapeId++);
        $objWriter->writeAttribute('id', $shapeId);
        $objWriter->endElement();
        // p:cNvPr
        // NOTE: Re: $shapeId This seems to be how PowerPoint 2010 does business.
        // p:cNvGrpSpPr
        $objWriter->writeElement('p:cNvGrpSpPr', null);
        // p:nvPr
        $objWriter->writeElement('p:nvPr', null);
        $objWriter->endElement();
        // p:nvGrpSpPr
        // p:grpSpPr
        $objWriter->startElement('p:grpSpPr');
        // a:xfrm
        $objWriter->startElement('a:xfrm');
        // a:off
        $objWriter->startElement('a:off');
        $objWriter->writeAttribute('x', CommonDrawing::pixelsToEmu($group->getOffsetX()));
        $objWriter->writeAttribute('y', CommonDrawing::pixelsToEmu($group->getOffsetY()));
        $objWriter->endElement();
        // a:off
        // a:ext
        $objWriter->startElement('a:ext');
        $objWriter->writeAttribute('cx', CommonDrawing::pixelsToEmu($group->getExtentX()));
        $objWriter->writeAttribute('cy', CommonDrawing::pixelsToEmu($group->getExtentY()));
        $objWriter->endElement();
        // a:ext
        // a:chOff
        $objWriter->startElement('a:chOff');
        $objWriter->writeAttribute('x', CommonDrawing::pixelsToEmu($group->getOffsetX()));
        $objWriter->writeAttribute('y', CommonDrawing::pixelsToEmu($group->getOffsetY()));
        $objWriter->endElement();
        // a:chOff
        // a:chExt
        $objWriter->startElement('a:chExt');
        $objWriter->writeAttribute('cx', CommonDrawing::pixelsToEmu($group->getExtentX()));
        $objWriter->writeAttribute('cy', CommonDrawing::pixelsToEmu($group->getExtentY()));
        $objWriter->endElement();
        // a:chExt
        $objWriter->endElement();
        // a:xfrm
        $objWriter->endElement();
        // p:grpSpPr
        $this->writeShapeCollection($objWriter, $group->getShapeCollection(), $shapeId);
        $objWriter->endElement();
        // p:grpSp
    }