code: def _get(self, rec_id=None, upstream=None):
          
          if rec_id:
              self.record_url = self.__class__.get_record_url(rec_id)
              self.debug_logger.debug("GET {} record with ID {}: {}".format(self.__class__.__name__, rec_id, self.record_url))
              response = requests.get(url=self.record_url, headers=HEADERS, verify=False)
              if not response.ok and response.status_code == requests.codes.NOT_FOUND:
                  raise RecordNotFound("Search for {} record with ID '{}' returned no results.".format(self.__class__.__name__, rec_id))
              self.write_response_html_to_file(response,"get_bob.html")
              response.raise_for_status()
              return response.json()
          elif upstream:
              rec_json = self.__class__.find_by({"upstream_identifier": upstream}, require=True)
              self.record_url = self.__class__.get_record_url(rec_json["id"])
          return rec_json
docs: Fetches a record by the record's ID or upstream_identifier.
  
          Raises:
              `pulsarpy.models.RecordNotFound`: A record could not be found.