code: def _ParseComment(self, structure):
      
      if structure[1] == 'Date:':
        self._year, self._month, self._day_of_month, _, _, _ = structure.date_time
      elif structure[1] == 'Fields:':
        self._ParseFieldsMetadata(structure)
docs: Parses a comment.
  
      Args:
        structure (pyparsing.ParseResults): structure parsed from the log file.