code: def VerifyStructure(self, parser_mediator, line):
      
      self._last_month = 0
      self._year_use = parser_mediator.GetEstimatedYear()
  
      key = 'header'
  
      try:
        structure = self._MAC_WIFI_HEADER.parseString(line)
      except pyparsing.ParseException:
        structure = None
  
      if not structure:
        key = 'turned_over_header'
  
        try:
          structure = self._MAC_WIFI_TURNED_OVER_HEADER.parseString(line)
        except pyparsing.ParseException:
          structure = None
  
      if not structure:
        logger.debug('Not a Mac Wifi log file')
        return False
  
      time_elements_tuple = self._GetTimeElementsTuple(key, structure)
  
      try:
        dfdatetime_time_elements.TimeElementsInMilliseconds(
            time_elements_tuple=time_elements_tuple)
      except ValueError:
        logger.debug(
            'Not a Mac Wifi log file, invalid date and time: {0!s}'.format(
                structure.date_time))
        return False
  
      self._last_month = time_elements_tuple[1]
  
      return True
docs: Verify that this file is a Mac Wifi log file.
  
      Args:
        parser_mediator (ParserMediator): mediates interactions between parsers
            and other components, such as storage and dfvfs.
        line (str): line from a text file.
  
      Returns:
        bool: True if the line is in the expected format, False if not.