@Override
    public boolean contains(@NotNull LongRangeSet other) {
      if (other instanceof ModRange modRange) {
        if (modRange.myFrom < myFrom || modRange.myTo > myTo) return false;
        int lcm = lcm(modRange.myMod);
        if (lcm <= Long.SIZE) {
          return (~widenBits(lcm) & modRange.widenBits(lcm)) == 0;
        }
      }
      long[] ranges = other.asRangeArray();
      for (int i = 0; i < ranges.length; i += 2) {
        if (!contains(ranges[i], ranges[i + 1])) return false;
      }
      return true;
    }
@Override
    public boolean contains(@NotNull LongRangeSet other)