private boolean contains(long from, long to) {
      if (from < myFrom || to > myTo) return false;
      if (to == from) return contains(from);
      if (to - from < 0 || to - from >= myMod) return false;
      int fromBit = remainder(from, myMod);
      int toBit = remainder(to, myMod);
      if (fromBit < toBit) {
        return Long.numberOfTrailingZeros(~(myBits >>> fromBit)) > toBit - fromBit;
      }
      return Long.numberOfTrailingZeros(~myBits) > toBit &&
             Long.SIZE - Long.numberOfLeadingZeros((~myBits) & getMask()) <= fromBit;
    }
private boolean contains(long from, long to)