code: @Override
      public void addDim(List<IntVar> c, int[] cUse, IntVar[] dUse) {
          capacities.add(c);
          cUsages.add(cUse);
          dUsages.add(dUse);
      }
docs: Add a dimension.
  @param c    the resource capacity of each of the nodes
  @param cUse the resource usage of each of the cSlices
  @param dUse the resource usage of each of the dSlices