def _additionalNSTest(self, addresses):
        """
        Verify that a response to an NS query has certain records in the
        I{additional} section.

        @param addresses: See C{_additionalTest}
        """
        self._additionalTest(
            "lookupNameservers", dns.Record_NS, addresses)

        Verify that a response to an NS query has certain records in the
        I{additional} section.

        @param addresses: See C{_additionalTest}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_names.py