ValueListBox's ChangeHandler problem

I have a code like this:
final ValueListBox<GCountry> countryList = new ValueListBox<GCountry>(new Renderer<GCountry>() {
            public String render(GCountry c) {
                String s = "";
                if (c != null) {
                    s = c.getTitleRus();
                } else {
                    s = "Choose a country";
                }
                return s;
            }
            public void render(GCountry c, Appendable appendable) throws IOException {
                String s = render(c);
                appendable.append(s);
            }
        });
...
countryList.addHandler(new ChangeHandler() {
        @Override
            public void onChange(ChangeEvent event) {
                GCountry gc = countryList.getValue();
                if (gc != null) {
                      getService().getAVCompanies(gc.getId(), null, null, cbAvcomp);
                }
            }
        }, ChangeEvent.getType() );

I only have a previous value (GCountry gc = countryList.getValue()) in handler but I need a value that user choose right now
How this code can be modified?

       

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