code: def serve(self):
      try:
          # Initialize instruments, bars and parameters.
          logger.info("Loading bars")
          loadedBars = []
          for dateTime, bars in self.__barFeed:
              loadedBars.append(bars)
          instruments = self.__barFeed.getRegisteredInstruments()
          self.__instrumentsAndBars = serialization.dumps(
              (instruments, loadedBars)
          )
          self.__barsFreq = self.__barFeed.getFrequency()
  
          if self.__autoStopThread:
              self.__autoStopThread.start()
  
          logger.info("Started serving")
          self.__startedServingEvent.set()
          self.serve_forever()
          logger.info("Finished serving")
  
          if self.__autoStopThread:
              self.__autoStopThread.join()
      finally:
          self.__forcedStop = True
  
imports: import threading
  import time
  from six.moves import xmlrpc_server
  import pyalgotrade.logger
  from pyalgotrade.optimizer import base
  from pyalgotrade.optimizer import serialization
label_desc: Use image node_id 9 for calling the Server obj's underlying member method code with example usage: obj.serve() without return types