@Override
public void onBind() {
super.onBind();
// two-way binding between checked and view.box()
binder.bind(checked).to(view.box());
// one-way binding between our derived value and view.label()'s text
binder.bind(() -> checked.isTrue() ? "Checked!" : "Not checked").to(textOf(view.label()));
}
@Override
public void onBind() {
super.onBind();
add(new HeaderPresenter(state.allTodos), view.headerPlaceholder());
add(new MainPresenter(state), view.mainPlaceholder());
add(new FooterPresenter(state), view.footerPlaceholder());
view.root().addAndReplaceElement(newInfoView(), view.infoPlaceholder());
binder.when(state.allTodos.size()).is(0).hide(view.main(), view.footer());
}