docs: private void sortEntriesForDimension(int d, int[] entriesByLB, int[] entriesByUB) {
      // Lists which hold entries sorted by their lower and
      // upper bounds in the current dimension.
      etdc.set(d, true);
      IntegerArrayQuickSort.sort(entriesByLB, etdc);
      etdc.setLb(false);
      IntegerArrayQuickSort.sort(entriesByUB, etdc);
    }