def old_properties_names_to_new(self):  # pragma: no cover, never called
        """Convert old Nagios2 names to Nagios3 new names

        TODO: still useful?

        :return: None
        """
        for i in itertools.chain(iter(list(self.items.values())),
                                 iter(list(self.templates.values()))):
            i.old_properties_names_to_new()