code: public void addSuperInterfacesInfo(Content classInfoTree) {
          //NOTE:  we really should be using ClassDoc.interfaceTypes() here, but
          //       it doesn't walk up the tree like we want it to.
          List<Type> interfaceArray = utils.getAllInterfaces(classDoc, configuration);
          if (classDoc.isInterface() && interfaceArray.size() > 0) {
              Content label = getResource(
                      "doclet.All_Superinterfaces");
              Content dt = HtmlTree.DT(label);
              Content dl = HtmlTree.DL(dt);
              dl.addContent(getClassLinks(LinkInfoImpl.Kind.SUPER_INTERFACES,
                      interfaceArray));
              classInfoTree.addContent(dl);
          }
      }
docs: {@inheritDoc}