code: def raw(self, format=None, **kwargs):
          
          station_codes = self._apply_features_filter(self._get_station_codes())
          metadata = self._get_metadata(station_codes, **kwargs)
          raw_data = self._get_raw_data(station_codes, **kwargs)
  
          return (metadata, raw_data)
docs: Returns a tuple of (metadata, raw data)