code: async def get_records_for_zone(self, dns_zone, params=None):
          
          managed_zone = self.get_managed_zone(dns_zone)
          url = f'{self._base_url}/managedZones/{managed_zone}/rrsets'
  
          if not params:
              params = {}
  
          if 'fields' not in params:
              # Get only the fields we care about
              params['fields'] = ('rrsets/name,rrsets/kind,rrsets/rrdatas,'
                                  'rrsets/type,rrsets/ttl,nextPageToken')
          next_page_token = None
  
          records = []
          while True:
              if next_page_token:
                  params['pageToken'] = next_page_token
              response = await self.get_json(url, params=params)
              records.extend(response['rrsets'])
              next_page_token = response.get('nextPageToken')
              if not next_page_token:
                  break
  
          logging.info(f'Found {len(records)} rrsets for zone "{dns_zone}".')
          return records
docs: Get all resource record sets for a managed zone, using the DNS zone.
  
          Args:
              dns_zone (str): Desired DNS zone to query.
              params (dict): (optional) Additional query parameters for HTTP
                  requests to the GDNS API.
          Returns:
              list of dicts representing rrsets.