docs: public String toUuidString() {
      		String[] items = new String[] {contentAsHex(0, 4), contentAsHex(4, 6),
                                contentAsHex(6, 8), contentAsHex(8, 10),
                                contentAsHex(10, 16)};
              String result = StringUtils.join(items, "-");
              return result.toLowerCase();
      }