code: protected void addLinksForIndexes(Content contentTree) {
          for (int i = 0; i < indexbuilder.elements().length; i++) {
              String unicode = (indexbuilder.elements())[i].toString();
              contentTree.addContent(
                      getHyperLink(getNameForIndex(unicode),
                      new StringContent(unicode)));
              contentTree.addContent(getSpace());
          }
      }
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