docs: def _update_ned_stream(
          self,
          transientsMetadataList
      ):
          """ update the NED stream within the catalogues database at the locations of the transients
  
          **Key Arguments:**
              - ``transientsMetadataList`` -- the list of transient metadata lifted from the database.
  
          .. todo ::
  
              - update key arguments values and definitions with defaults
              - update return values and definitions
              - update usage examples and text
              - update docstring text
              - check sublime snippet exists
              - clip any useful text to docs mindmap
              - regenerate the docs and check redendering of this docstring
          """
          self.log.debug('starting the ``_update_ned_stream`` method')
  
          coordinateList = []
          for i in transientsMetadataList:
              # thisList = str(i["ra"]) + " " + str(i["dec"])
              thisList = (i["ra"], i["dec"])
              coordinateList.append(thisList)
  
          coordinateList = self._remove_previous_ned_queries(
              coordinateList=coordinateList
          )
  
          # MINIMISE COORDINATES IN LIST TO REDUCE NUMBER OF REQUIRE NED QUERIES
          coordinateList = self._consolidate_coordinateList(
              coordinateList=coordinateList
          )
  
          stream = ned(
              log=self.log,
              settings=self.settings,
              coordinateList=coordinateList,
              radiusArcsec=self.settings["ned stream search radius arcec"]
          )
          stream.ingest()
  
          sqlQuery = """SET session sql_mode = "";""" % locals(
          )
          writequery(
              log=self.log,
              sqlQuery=sqlQuery,
              dbConn=self.cataloguesDbConn
          )
  
          sqlQuery = """update tcs_cat_ned_stream set magnitude = CAST(`magnitude_filter` AS DECIMAL(5,2)) where magnitude is null;""" % locals(
          )
          writequery(
              log=self.log,
              sqlQuery=sqlQuery,
              dbConn=self.cataloguesDbConn
          )
  
          self.log.debug('completed the ``_update_ned_stream`` method')
          return None