anchor.diff:      ;
   
   get_model_response
  -    : ParOpen ModelResponse model_response* ParClose
  +    : ParOpen RS_Model model_response* ParClose
  +    | ParOpen model_response* ParClose
       ;
   
   get_option_response
  
positive.code:     : ':version'
      ;
  
  UndefinedSymbol:
      Sym (Digit | Sym)*;
  
  ModelResponse
      : 'model'
      ;
  
  // Parser Rules Start
  
  
negative.code:     | GRW_Numeral
      | GRW_Par
      | GRW_String
      | RS_Model
      ;
  
  
  