code: def initialize(self, config, context):
      
      if TumblingWindowBolt.WINDOW_DURATION_SECS in config:
        self.window_duration = int(config[TumblingWindowBolt.WINDOW_DURATION_SECS])
      else:
        self.logger.fatal("Window Duration has to be specified in the config")
  
      # By modifying the config, we are able to setup the tick timer
      config[api_constants.TOPOLOGY_TICK_TUPLE_FREQ_SECS] = str(self.window_duration)
      self.current_tuples = deque()
      if hasattr(self, 'saved_state'):
        if 'tuples' in self.saved_state:
          self.current_tuples = self.saved_state['tuples']
docs: We initialize the window duration and slide interval