code: @Deprecated
    public static MutableRoaringBitmap flip(ImmutableRoaringBitmap bm,
                                              final int rangeStart, final int rangeEnd) {
      if (rangeStart >= 0) {
        return flip(bm, (long) rangeStart, (long) rangeEnd);
      }
      // rangeStart being -ve and rangeEnd being positive is not expected)
      // so assume both -ve
      return flip(bm, rangeStart & 0xFFFFFFFFL, rangeEnd & 0xFFFFFFFFL);
    }
docs: Complements the bits in the given range, from rangeStart (inclusive) rangeEnd (exclusive). The
  given bitmap is unchanged.
  
  @param bm bitmap being negated
  @param rangeStart inclusive beginning of range
  @param rangeEnd exclusive ending of range
  @return a new Bitmap
  @deprecated use the version where longs specify the range