anchor.diff:  
     group("DialogWindowComponent", () {
   
  -    var yes_button, cancel_button;
  +    var yes_button, no_button;
   
       setUp(() {
         dw = new DialogWindowComponent("hello world", {
  
positive.code:       verify(dw.behavior_instances[0].hide());
      });
  
    });
  
  }
  
negative.code:         "no" :  { "caption": "No",  "type": "blue",  "value": "NO CLICKED"  }
        });
        yes_button    = dw.findFirstChildByRole("option_yes");
        no_button = dw.findFirstChildByRole("option_no");
      });
  
      test("creates an option button for each option", () {
        expect(yes_button, isNotNull);
        expect(no_button, isNotNull);
      });
  
      test("button's dom_elements are added in to a special button container", () {
  