anchor.diff:    const ASubscriber: IMARSHandleRequestEventListener);
   begin
     FSubscribers.Add(ASubscriber);
  +end;
  +
  +class destructor TMARSEngine.ClassDestructor;
  +begin
  +  if Assigned(_Instance) then
  +    FreeAndNil(_Instance);
   end;
   
   constructor TMARSEngine.Create;
  
positive.code:   Result := FURL;
  end;
  
  end.
  
negative.code:     property CurrentToken: TMARSToken read GetCurrentToken;
      property CurrentRequest: TWebRequest read GetCurrentRequest;
      property CurrentResponse: TWebResponse read GetCurrentResponse;
      class property Instance: TMARSEngine read GetInstance;
      class destructor ClassDestructor;
    end;
  
  implementation
  