assertEquals(1, presenter.firstEventsWithoutParameterHandled);
assertEquals(1, presenter.secondEventsHandled);
assertEquals(2, presenter.firstAndSecondEventsHandled);
// After unregistering
registration.removeHandler();
eventBus.fireEvent(new FirstEvent());
eventBus.fireEvent(new SecondEvent());
assertEquals(1, presenter.firstEventsHandled);
assertEquals(1, presenter.firstEventsWithoutParameterHandled);
assertEquals(1, presenter.secondEventsHandled);