Migration to Vaadin7. Widgestset.

Hi respected community. I have one question.

I have a class that extends TextField:

public class ValidatedTextField extends TextField{

//other code
[/code]GWT widget that extends this class:

public class VValidatedTextField extends VTextField implements Paintable{
    public void updateFromUIDL(UIDL uidl, ApplicationConnection client){
//other code


How it is implemented in Vaadin 7?

I would be grateful for any ideas.