code: private List<Element> getInheritedPackagePrivateMethods() {
          List<Element> results = new ArrayList<>();
          for (TypeElement currentClass : visibleClasses) {
              if (currentClass != typeElement &&
                  utils.isPackagePrivate(currentClass) &&
                  !utils.isLinkable(currentClass)) {
                  // Document these members in the child class because
                  // the parent is inaccessible.
                  results.addAll(classMap.get(currentClass).members);
              }
          }
          return results;
      }
docs: Return the package private members inherited by the class.  Only return
  if parent is package private and not documented.
  
  @return the package private members inherited by the class.