code: public static List<DCSubject> convertElementsSyndCategoryToSubject(final List<SyndCategory> cList) {
          List<DCSubject> sList = null;
          if (cList != null) {
              sList = new ArrayList<DCSubject>();
              for (int i = 0; i < cList.size(); i++) {
                  final SyndCategoryImpl sCat = (SyndCategoryImpl) cList.get(i);
                  DCSubject subject = null;
                  if (sCat != null) {
                      subject = sCat.getSubject();
                  }
                  sList.add(subject);
              }
          }
          return sList;
      }
docs: Returns a list with the DCSubject elements of the SyndCategoryImpl list facade. To be used by
  the SyndFeedImpl class only.
  <p>
  
  @param cList the list with SyndCategoryImpl elements to convert to subject list.
  @return a list with DCSubject elements corresponding to the categories in the given list.