PhpOffice\PhpPresentation\Writer\PowerPoint2007\LayoutPack\TemplateBased::cmpMaster PHP Method

    public static function cmpMaster($firstSlide, $secondSlide)
    {
        if ($firstSlide['masterid'] == $secondSlide['masterid']) {
            return 0;
        }
        return $firstSlide['masterid'] < $secondSlide['masterid'] ? -1 : 1;
    }