ScrollableRepeator repeator = new ScrollableRepeator(screen, Vector2f.ZERO, new Vector2f(300f,150f)){};

        Button btn1 = new Button(screen, Vector2f.ZERO){
            @Override
            public void onButtonMouseLeftDown(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonMouseRightDown(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonMouseLeftUp(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonMouseRightUp(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonFocus(MouseMotionEvent mme) {}
            @Override
            public void onButtonLostFocus(MouseMotionEvent mme) {}
        };

        Button btn2 = new Button(screen, Vector2f.ZERO){
            @Override
            public void onButtonMouseLeftDown(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonMouseRightDown(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonMouseLeftUp(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonMouseRightUp(MouseButtonEvent mbe, boolean bln) {}
            @Override
            public void onButtonFocus(MouseMotionEvent mme) {}
            @Override
            public void onButtonLostFocus(MouseMotionEvent mme) {}
        };

        repeator.setControlClippingLayer(repeator);
        repeator.addScrollableChild(btn1);
        repeator.addScrollableChild(btn2);
        screen.addElement(repeator);
        VScrollBar vScrollBar = repeator.getVScrollBar();
        boolean isVisible = vScrollBar.getIsVisible();