final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());
            @SuppressWarnings("unchecked")
            final List<Map<String, Object>> fileList = (List<Map<String, Object>>) contentMap.get("file");
            return fileList.stream().map(fileMap -> {
                try {
                    final String path = fileMap.get("path").toString();
                    final Date timestamp =