def export_domain(self, domain):
        """
        Provides the BIND (Berkeley Internet Name Domain) 9 formatted contents
        of the requested domain. This call is for a single domain only, and as
        such, does not provide subdomain information.

        Sample export:
            {u'accountId': 000000,
             u'contentType': u'BIND_9',
             u'contents': u'example.com.\t3600\tIN\tSOA\tns.rackspace.com. '
                'foo@example.com. 1354202974 21600 3600 1814400 500'
                'example.com.\t3600\tIN\tNS\tdns1.stabletransit.com.'
                'example.com.\t3600\tIN\tNS\tdns2.stabletransit.com.',
             u'id': 1111111}
        """
        uri = "/domains/%s/export" % utils.get_id(domain)
        resp, resp_body = self._async_call(uri, method="GET",
                error_class=exc.NotFound)
        return resp_body.get("contents", "")
Provides the BIND (Berkeley Internet Name Domain) 9 formatted contents
        of the requested domain. This call is for a single domain only, and as
        such, does not provide subdomain information.

        Sample export:
            {u'accountId': 000000,
             u'contentType': u'BIND_9',
             u'contents': u'example.com.\t3600\tIN\tSOA\tns.rackspace.com. '
                'foo@example.com. 1354202974 21600 3600 1814400 500'
                'example.com.\t3600\tIN\tNS\tdns1.stabletransit.com.'
                'example.com.\t3600\tIN\tNS\tdns2.stabletransit.com.',
             u'id': 1111111}