docs: public static long uidToLong(final byte[] uid, final short uid_length) {
      if (uid.length != uid_length) {
        throw new IllegalArgumentException("UID was " + uid.length 
            + " bytes long but expected to be " + uid_length);
      }
      
      final byte[] uid_raw = new byte[8];
      System.arraycopy(uid, 0, uid_raw, 8 - uid_length, uid_length);
      return Bytes.getLong(uid_raw);
    }