private function __buildDatasourcePooledParamList($datasources)
    {
        if (!is_array($datasources) || empty($datasources)) {
            return array();
        }

        $list = array();

        foreach ($datasources as $handle) {
            $rootelement = str_replace('_', '-', $handle);
            $list[] = '$ds-' . $rootelement;
        }

        return $list;
    }