PhpOffice\PhpPresentation\Writer\ODPresentation\Content::writeShapeGroup PHP Method

    public function writeShapeGroup(XMLWriter $objWriter, Group $group)
    {
        // draw:g
        $objWriter->startElement('draw:g');
        $shapes = $group->getShapeCollection();
        foreach ($shapes as $shape) {
            // Increment $this->shapeId
            ++$this->shapeId;
            // Check type
            if ($shape instanceof RichText) {
                $this->writeShapeTxt($objWriter, $shape);
            } elseif ($shape instanceof Table) {
                $this->writeShapeTable($objWriter, $shape);
            } elseif ($shape instanceof Line) {
                $this->writeShapeLine($objWriter, $shape);
            } elseif ($shape instanceof Chart) {
                $this->writeShapeChart($objWriter, $shape);
            } elseif ($shape instanceof ShapeDrawing\AbstractDrawingAdapter) {
                $this->writeShapeDrawing($objWriter, $shape);
            } elseif ($shape instanceof Group) {
                $this->writeShapeGroup($objWriter, $shape);
            }
        }
        $objWriter->endElement();
        // draw:g
    }