code: def _GetSources(self, event_object):
      
      try:
        source_short, source_long = (
            formatters_manager.FormattersManager.GetSourceStrings(event_object))
      except KeyError as exception:
        logging.warning(
            'Unable to correctly assemble event with error: {0!s}'.format(
                exception))
  
      return source_short, source_long
docs: Returns properly formatted source strings.
  
      Args:
        event_object: the event object (instance od EventObject).