docs: public static short getFlagsFromQualifier(final byte[] qualifier, 
        final int offset) {
      validateQualifier(qualifier, offset);
      if ((qualifier[offset] & Const.MS_BYTE_FLAG) == Const.MS_BYTE_FLAG) {
        return (short) (qualifier[offset + 3] & Internal.FLAGS_MASK); 
      } else {
        return (short) (qualifier[offset + 1] & Internal.FLAGS_MASK);
      }
    }