code: private static byte[] getDecodabet(int options) {
          if ((options & URL_SAFE) == URL_SAFE) {
              return _URL_SAFE_DECODABET;
          } else if ((options & ORDERED) == ORDERED) {
              return _ORDERED_DECODABET;
          } else {
              return _STANDARD_DECODABET;
          }
      }
docs: Returns one of the _SOMETHING_DECODABET byte arrays depending on the options specified. It's possible, though silly, to
  specify ORDERED and URL_SAFE in which case one of them will be picked, though there is no guarantee as to which one will
  be picked.