anchor.diff:  
     @override
     String toString() {
  -    return '${super.toString()} p1 ${_param1}';
  +    return '${super.toString()} p1 $_param1';
     }
   }
   
  
positive.code: 
    @override
    String toString() {
      return '${super.toString()} ${top}/${bottom} ${data![2]} ${data![3]}';
    }
  //
  //    @Override
  
negative.code: 
    @override
    String toString() {
      return '${super.toString()} meta $metaCommand data ${hexQuickView(data)}';
    }
  }
  
  