final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());
                    if (logger.isDebugEnabled()) {
                        logger.debug("[getParentGroup] Response for id {}: {}", id, contentMap);
                    }
                    if (contentMap.containsKey("value")) {
                        final String[] values = DocumentUtil.getValue(contentMap, "value", String[].class);