code: public PactDslJsonArray uuid(String uuid) {
          if (!uuid.matches(UUID_REGEX)) {
              throw new InvalidMatcherException(EXAMPLE + uuid + "\" is not an UUID");
          }
          body.put(uuid);
          matchers.addRule(rootPath + appendArrayIndex(0), regexp(UUID_REGEX));
          return this;
      }
docs: Element that must be encoded as an UUID
  @param uuid example UUID to use for generated bodies