code: def systemEventSSE(symbols=None, on_data=None, token='', version=''):
      '''The System event message is used to indicate events that apply to the market or the data feed.
  
      There will be a single message disseminated per channel for each System Event type within a given trading session.
  
      https://iexcloud.io/docs/api/#deep-system-event
  
      Args:
          symbols (string); Tickers to request
          on_data (function): Callback on data
          token (string); Access token
          version (string); API version
  
      '''
      return _runSSE('system-event', symbols, on_data, token, versionf systemEventSSE(symbols=None, on_data=None, token='', version=''):
      '''The System event message is used to indicate events that apply to the market or the data feed.
  
      There will be a single message disseminated per channel for each System Event type within a given trading session.
  
      https://iexcloud.io/docs/api/#deep-system-event
  
      Args:
          symbols (string); Tickers to request
          on_data (function): Callback on data
          token (string); Access token
          version (string); API version
  
      '''
      return _runSSE('system-event', symbols, on_data, token, version)
docs: The System event message is used to indicate events that apply to the market or the data feed.
  
      There will be a single message disseminated per channel for each System Event type within a given trading session.
  
      https://iexcloud.io/docs/api/#deep-system-event
  
      Args:
          symbols (string); Tickers to request
          on_data (function): Callback on data
          token (string); Access token
          version (string); API version