public function haveTermRelationshipInDatabase($object_id, $term_taxonomy_id, $term_order = 0)
    {
        $this->haveInDatabase($this->grabTermRelationshipsTableName(), [
            'object_id' => $object_id,
            'term_taxonomy_id' => $term_taxonomy_id,
            'term_order' => $term_order,
        ]);
    }