code: public static DocPath forClass(Utils utils, TypeElement typeElement) {
          return (typeElement == null)
                  ? empty
                  : forPackage(utils.containingPackage(typeElement)).resolve(forName(utils, typeElement));
      }
docs: Return the path for a class.
  For example, if the class is java.lang.Object,
  the path is java/lang/Object.html.