Possibility of React + GWT?

ReactExample.java

import static react.ReactDOM.*;

class TodoList extends ReactComponent {
    public static final ReactProp<List<TodoItem>> ITEMS = ReactProp.create();

    public static ReactElement.Builder<TodoList> builder() {
        return ReactElement.builder(TodoList.class);
    }

    public ReactElement render() {
        ReactElement.Builder builder = ul();
        for (TodoItem item : get(ITEMS)) {
            builder.add(li()
                .key(item.id())
                .add(item.text())
                .build());
        }
        return builder.build();
    }
}

class TodoApp extends ReactComponent {
    public static ReactElement.Builder<TodoApp> builder() {
        return ReactElement.builder(TodoApp.class);
    }

    private static final ReactState<List<TodoItem>> ITEMS = ReactState.create();
    private static final ReactState<String> TEXT = ReactState.create();

    private final EventListener onChange = (e) -> {
        setState(TEXT.to(InputElement.as(e.getEventTarget()).getValue()));
    };

    private final EventListener handleSubmit = (e) -> {
        e.preventDefault();
        List<TodoItem> nextItems = Lists.newArrayList(get(ITEMS));
        nextItems.add(new TodoItem(System.currentTimeMillis(), get(TEXT)));
        setState(
            ITEMS.to(nextItems),
            TEXT.to("")
        );
    };

    @Override
    public ReactElement render() {
        return div()
            .add(h3().add("TODO").build())
            .add(TodoList.builder()
                .prop(TodoList.ITEMS, get(ITEMS))
                .build())
            .add(form()
                .prop("onSubmit", handleSubmit)
                .add(input()
                    .prop("onChange", onChange)
                    .prop("value", get(TEXT))
                    .build())
                .add(button()
                    .add("Add #" + (get(ITEMS).size() + 1))
                    .build())
                .build())
            .build();
    }
}

ReactDOM.render(TodoApp.builder().build(), DOM.getElementById("container"));