code: public SortedSet<TypeElement> allClasses(PackageElement packageElement) {
          return utils.isSpecified(packageElement)
                  ? utils.getTypeElementsAsSortedSet(utils.getEnclosedTypeElements(packageElement))
                  : getSet(allClasses, packageElement);
      }
docs: Return all of the classes specified on the command-line that belong to the given package.
  
  @param packageElement the package to return the classes for.