Enable/Disable button on selection of ComboBox in the grid Vaadin 8

Here's an example:

public class MyUI extends UI {

    public static class MyBean {
        public boolean isButtonEnabled() {
            return buttonEnabled;
        }
        public void setButtonEnabled(boolean buttonEnabled) {
            this.buttonEnabled = buttonEnabled;
        }
        public String getS() {
            return s;
        }
        public void setS(String s) {
            this.s = s;
        }
        private boolean buttonEnabled = true;
        private String s;
    }

    @Override
    protected void init(VaadinRequest vaadinRequest) {
        Grid<MyBean> grid = new Grid<>();
        MyBean f1 = new MyBean();
        f1.setS("fff");
        MyBean f2 = new MyBean();
        f2.setS("uuu");
        grid.setItems(f1, f2);
        grid.addComponentColumn(myBean -> {
            ComboBox<String> comboBox = new ComboBox<>();
            comboBox.setItems("Item 1", "Item 2");
            comboBox.addValueChangeListener(e -> {
                myBean.setButtonEnabled(!myBean.isButtonEnabled());
                grid.getDataProvider().refreshItem(myBean);
            });
            return comboBox;
        });
        grid.addComponentColumn(myBean -> {
            Button button = new Button("Click me", e -> {
                Notification.show("You could click the Button");
            });
            button.setEnabled(myBean.isButtonEnabled());
            return button;
        });
        this.setContent(grid);
    }

    @WebServlet(urlPatterns = "/*", name = "MyUIServlet", asyncSupported = true)
    @VaadinServletConfiguration(ui = MyUI.class, productionMode = false)
    public static class MyUIServlet extends VaadinServlet {
    }
}