code: def get_device_sdr(self, record_id, reservation_id=None):
          
          (next_id, record_data) = \
              get_sdr_data_helper(self.reserve_device_sdr_repository,
                                  self._get_device_sdr_chunk,
                                  record_id, reservation_id)
  
          return sdr.SdrCommon.from_data(record_data, next_id)
docs: Collects all data from the sensor device to get the SDR
          specified by record id.
  
          `record_id` the Record ID.
          `reservation_id=None` can be set. if None the reservation ID will
          be determined.