code: private List<ProgramElementDoc> getInheritedPackagePrivateMethods(Configuration configuration) {
          List<ProgramElementDoc> results = new ArrayList<>();
          for (ClassDoc currentClass : visibleClasses) {
              if (currentClass != classdoc &&
                  currentClass.isPackagePrivate() &&
                  !utils.isLinkable(currentClass, configuration)) {
                  // Document these members in the child class because
                  // the parent is inaccessible.
                  results.addAll(getMembersFor(currentClass));
              }
          }
          return results;
      }
docs: Return the package private members inherited by the class.  Only return
  if parent is package private and not documented.
  
  @param configuration the current configuration of the doclet.
  @return the package private members inherited by the class.