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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 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()