code: def VerifyStructure(self, parser_mediator, line):
      
      # TODO: self._line_structures is a work-around and this needs
      # a structural fix.
      self._line_structures = self.LINE_STRUCTURES
  
      self._day_of_month = None
      self._month = None
      self._year = None
  
      # TODO: Examine other versions of the file format and if this parser should
      # support them. For now just checking if it contains the IIS header.
      if self._SIGNATURE in line:
        return True
  
      return False
docs: Verify that this file is an IIS 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 was successfully parsed.