public function getContentTypeGrouping($contenttypeslug)
    {
        $grouping = false;
        $taxonomy = $this->getContentTypeTaxonomy($contenttypeslug);
        foreach ($taxonomy as $tax) {
            if ($tax['behaves_like'] === 'grouping') {
                $grouping = $tax['slug'];
                break;
            }
        }

        return $grouping;
    }