Point TabsPanel gxt 3.1

Hello,

I have this code:

Code:

  VerticalPanel vp = new VerticalPanel();
        vp.setSpacing(10);

       
        
        final TabPanel panel = new TabPanel();
        panel.setPixelSize(450, 250);
        Label normal = new Label("Test");
        panel.add(normal, "Test");
        vp.add(panel);

        RootPanel.get().add(vp);

How to remove this point with the tab?

tabs.jpg

Point TabsPanel gxt 3.1