public function get_unit_objects() { $workroom = new koala_container($this->containing_course->get_workroom()); $workroom->set_types_visible(CLASS_ROOM | CLASS_CONTAINER | CLASS_DOCEXTERN); $workroom->set_obj_types_invisible(array("container_wiki_koala", "room_wiki_koala", "KOALA_WIKI")); return $workroom->get_inventory(); }