code: protected void addLinksForIndexes(Content contentTree) {
          for (int i = 0; i < indexElements.size(); i++) {
              int j = i + 1;
              contentTree.addContent(getHyperLink(DocPaths.indexN(j),
                      new StringContent(indexElements.get(i).toString())));
              contentTree.addContent(Contents.SPACE);
          }
      }
docs: Add links for all the Index Files per unicode character.
  
  @param contentTree the content tree to which the links for indexes will be added