code: def VerifyStructure(self, parser_mediator, lines):
      
      match_generator = self._VERIFICATION_GRAMMAR.scanString(lines, maxMatches=1)
      return bool(list(match_generator))
docs: Verifies that this is a bash history 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.