@Override
    public @NotNull LongRangeSet abs(LongRangeType lrType) {
      if (myFrom >= 0) return this;
      long minValue = lrType.min();
      long low = myFrom, hi = myTo;
      if (low <= minValue) {
        low = minValue + 1;
      }
      if (myTo <= 0) {
        hi = -low;
        low = -myTo;
      }
      else {
        hi = Math.max(-low, hi);
        low = 0;
      }
      if (low > hi) {
        return lrType.fullRange();
      }
      if (myFrom <= minValue) {
        return new RangeSet(new long[]{minValue, minValue, low, hi});
      }
      else {
        return new Range(low, hi);
      }
    }
@Override
    public @NotNull LongRangeSet abs(LongRangeType lrType)