public function get_categories() {
        $data = $this->data;

        if (empty($data[Parser::INDEX_PARENT_SPEC])) {
            return array();
        }

        // Okay. We first grab all of our categories.
        $categories = array();
        foreach ($data[Parser::INDEX_PARENT_SPEC] as $category) {
            $categories[] = $this->api->get_category($category['value']);
        }

        return $categories;
    }