try {
                logger.fine(() -> ">>> " + method + " " + url);
                final URL u = new URL(url);
                connection = open(u);
                connection.setRequestMethod(method.toString());
                if (headerList != null) {
                    for (final String[] values : headerList) {
                        logger.fine(() -> ">>> " + values[0] + "=" + values[1]);