def test_accepts_queryset(self):
     P(EmptyModel.objects.all())
 def test_accepts_list(self):
     P([N(EmptyModel), G(EmptyModel)])
 def test_accepts_tuple(self):
     P((N(EmptyModel), G(EmptyModel)))
 def test_accept_model_instance(self):
     P(N(EmptyModel))
     P(G(EmptyModel))