def _lookupSomeRecords(self, method, soa, makeRecord, target, addresses):
        """
        Perform a DNS lookup against a L{FileAuthority} configured with records
        as defined by C{makeRecord} and C{addresses}.

        @param method: The name of the lookup method to use; for example,
            C{"lookupNameservers"}.
        @type method: L{str}

        @param soa: A L{Record_SOA} for the zone for which the L{FileAuthority}
            is authoritative.

        @param makeRecord: A one-argument callable which accepts a name and
            returns an L{IRecord} provider.  L{FileAuthority} is constructed
            with this record.  The L{FileAuthority} is queried for a record of
            the resulting type with the given name.

        @param target: The extra name which the record returned by
            C{makeRecord} will be pointed at; this is the name which might
            require extra processing by the server so that all the available,
            useful information is returned.  For example, this is the target of
            a CNAME record or the mail exchange host pointed to by an MX record.
        @type target: L{bytes}

        @param addresses: A L{list} of records giving addresses of C{target}.

        @return: A L{Deferred} that fires with the result of the resolver
            method give by C{method}.
        """
        authority = NoFileAuthority(
            soa=(soa.mname.name, soa),
            records={
                soa.mname.name: [makeRecord(target)],
                target: addresses,
                },
            )
        return getattr(authority, method)(soa_record.mname.name)

        Perform a DNS lookup against a L{FileAuthority} configured with records
        as defined by C{makeRecord} and C{addresses}.

        @param method: The name of the lookup method to use; for example,
            C{"lookupNameservers"}.
        @type method: L{str}

        @param soa: A L{Record_SOA} for the zone for which the L{FileAuthority}
            is authoritative.

        @param makeRecord: A one-argument callable which accepts a name and
            returns an L{IRecord} provider.  L{FileAuthority} is constructed
            with this record.  The L{FileAuthority} is queried for a record of
            the resulting type with the given name.

        @param target: The extra name which the record returned by
            C{makeRecord} will be pointed at; this is the name which might
            require extra processing by the server so that all the available,
            useful information is returned.  For example, this is the target of
            a CNAME record or the mail exchange host pointed to by an MX record.
        @type target: L{bytes}

        @param addresses: A L{list} of records giving addresses of C{target}.

        @return: A L{Deferred} that fires with the result of the resolver
            method give by C{method}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_names.py