code: def GetEventTypeString(self, event_type):
      
      if 0 <= event_type < len(self._EVENT_TYPES):
        return self._EVENT_TYPES[event_type]
      return 'Unknown {0:d}'.format(event_type)
docs: Retrieves a string representation of the event type.
  
      Args:
        event_type (int): event type.
  
      Returns:
        str: description of the event type.