docs: public static MutableRoaringBitmap andNot(final ImmutableRoaringBitmap x1,
        final ImmutableRoaringBitmap x2, long rangeStart, long rangeEnd) {
      MutableRoaringBitmap.rangeSanityCheck(rangeStart,rangeEnd);
      MutableRoaringBitmap rb1 = selectRangeWithoutCopy(x1, rangeStart, rangeEnd);
      MutableRoaringBitmap rb2 = selectRangeWithoutCopy(x2, rangeStart, rangeEnd);
      return andNot(rb1, rb2);
    }