ToolbarItem MVVM command

I have been struggeling with this.
I'm trying to move my toolbar item commands to my viewmodel
Right now my code is like this

` public class SwipePageViewModel : BaseViewModel
{
public ICommand ShowBaskedCommand { get; private set; }

    public SwipePageViewModel()
    {
        ShowBaskedCommand = new Command(ShowBasket);
    }

    private void ShowBasket()
    {
        Navigation.PushAsync(new HomePage() {Title = AppResources.Page2});
    }

}`

My problem is that Navigation is not found in my view model. And therefore I can't push my view.
What to do?