code: def close_streaming_interface(self):
          
  
          super(ReferenceDevice, self).close_streaming_interface()
  
          self.rpc(8, rpcs.SG_GRAPH_INPUT, 8, streams.COMM_TILE_CLOSED)
docs: Called when someone closes the streaming interface to the device.
  
          This method will automatically notify sensor_graph that there is a no
          longer a streaming interface opened.