code: protected List<CmsDetailPageInfo> mergeDetailPages(
          List<CmsDetailPageInfo> parentDetailPages,
          List<CmsDetailPageInfo> ownDetailPages) {
  
          List<CmsDetailPageInfo> parentDetailPageCopies = Lists.newArrayList();
          for (CmsDetailPageInfo info : parentDetailPages) {
              parentDetailPageCopies.add(info.copyAsInherited());
          }
  
          List<CmsDetailPageInfo> result = new ArrayList<CmsDetailPageInfo>();
          Map<String, List<CmsDetailPageInfo>> resultDetailPageMap = Maps.newHashMap();
          resultDetailPageMap.putAll(getDetailPagesMap(parentDetailPageCopies));
          resultDetailPageMap.putAll(getDetailPagesMap(ownDetailPages));
          result = new ArrayList<CmsDetailPageInfo>();
          for (List<CmsDetailPageInfo> pages : resultDetailPageMap.values()) {
              result.addAll(pages);
          }
          return result;
      }
docs: Merges two lists of detail pages, one from a parent configuration and one from a child configuration.<p>
  
  @param parentDetailPages the parent's detail pages
  @param ownDetailPages the child's detail pages
  
  @return the merged detail pages