code: def VerifyStructure(self, parser_mediator, lines):
      
      try:
        structure = self._SDF_HEADER.parseString(lines)
      except pyparsing.ParseException:
        logger.debug('Not a SkyDrive log file')
        return False
  
      try:
        dfdatetime_time_elements.TimeElementsInMilliseconds(
            time_elements_tuple=structure.header_date_time)
      except ValueError:
        logger.debug(
            'Not a SkyDrive log file, invalid date and time: {0!s}'.format(
                structure.header_date_time))
        return False
  
      return True
docs: Verify that this file is a SkyDrive log file.
  
      Args:
        parser_mediator (ParserMediator): mediates interactions between parsers
            and other components, such as storage and dfvfs.
        lines (str): one or more lines from the text file.
  
      Returns:
        bool: True if this is the correct parser, False otherwise.