code: @Override
      public void addSubClassInfo(Content classInfoTree) {
          if (utils.isClass(typeElement)) {
              if (typeElement.getQualifiedName().toString().equals("java.lang.Object") ||
                      typeElement.getQualifiedName().toString().equals("org.omg.CORBA.Object")) {
                  return;    // Don't generate the list, too huge
              }
              Set<TypeElement> subclasses = classtree.directSubClasses(typeElement, false);
              if (!subclasses.isEmpty()) {
                  Content label = contents.subclassesLabel;
                  Content dt = HtmlTree.DT(label);
                  Content dl = HtmlTree.DL(dt);
                  dl.addContent(getClassLinks(LinkInfoImpl.Kind.SUBCLASSES,
                          subclasses));
                  classInfoTree.addContent(dl);
              }
          }
      }
docs: {@inheritDoc}