@NotNull
    private static LongRangeSet getDefiniteRange(@NotNull LongRangeSet startSet, @NotNull LongRangeSet lengthSet) {
      long maxLeftBorder = startSet.max();
      LongRangeSet lengthMinusOne = lengthSet.minus(LongRangeSet.point(1), LongRangeType.INT32);
      long minRightBorder = startSet.plus(lengthMinusOne, LongRangeType.INT32).min();
      if (maxLeftBorder > minRightBorder) return LongRangeSet.empty();
      return LongRangeSet.range(maxLeftBorder, minRightBorder);
    }
@NotNull
    private static LongRangeSet getDefiniteRange(@NotNull LongRangeSet startSet, @NotNull LongRangeSet lengthSet)