code: public final List<CellName> sort(List<CellName> clusteringKeys) {
          List<CellName> result = new ArrayList<>(clusteringKeys);
          Collections.sort(result, new Comparator<CellName>() {
              @Override
              public int compare(CellName o1, CellName o2) {
                  return cellNameType.compare(o1, o2);
              }
          });
          return result;
      }
docs: Returns the specified list of clustering keys sorted according to the table cell name comparator.
  
  @param clusteringKeys The list of clustering keys to be sorted.
  @return The specified list of clustering keys sorted according to the table cell name comparator.