code: def add_streamer(self, streamer):
          
  
          if self._max_streamers is not None and len(self.streamers) >= self._max_streamers:
              raise ResourceUsageError("Maximum number of streamers exceeded", max_streamers=self._max_streamers)
  
          streamer.link_to_storage(self.sensor_log)
          streamer.index = len(self.streamers)
  
          self.streamers.append(streamer)
docs: Add a streamer to this sensor graph.
  
          Args:
              streamer (DataStreamer): The streamer we want to add