public static function getSolrType() {
        $relationships = PlatformAppConfig::get('relationships');
        if (!isset($relationships['solr'])) {
            return FALSE;
        }
        list($solr_key, ) = explode(':', $relationships['solr']);
        $solr_config = self::get($solr_key);
        if (!isset($solr_config['type'])) {
            return FALSE;
        }
        return $solr_config['type'];
    }