docs: public static boolean isValidRandomIdentifier( String identifier ) {
          if (identifier.length() == UUID_LENGTH) {
              // It's the right length, but see if it's a UUID ...
              try {
                  UUID.fromString(identifier);
                  return true;
              } catch (IllegalArgumentException e) {
                  // Nope
                  return false;
              }
          }
          return false;
      }