如何在Caliburn Micro WPF中导航回以前的视图？

public class MainViewModel : Screen
{
    private readonly INavigationService _navigationService;

    public MainViewModel(INavigationService navigationService)
    {
        _navigationService = navigationService;
    }

    public void NavigateToOtherView()
    {
        _navigationService.NavigateToViewModel<OtherViewModel>();
    }

    public void GoBackToPreviousView()
    {
        if (_navigationService.CanGoBack)
        {
            _navigationService.GoBack();
        }
    }
}

public class OtherViewModel : Screen
{
    private readonly INavigationService _navigationService;

    public OtherViewModel(INavigationService navigationService)
    {
        _navigationService = navigationService;
    }

    public void GoBackToMainView()
    {
        _navigationService.GoBack();
    }
}