return &s.NodeSelector
}

// LabelSelectorWrapper wraps a LabelSelector inside.
type LabelSelectorWrapper struct{ metav1.LabelSelector }

// MakeLabelSelector creates a LabelSelector wrapper.
func MakeLabelSelector() *LabelSelectorWrapper {
	return &LabelSelectorWrapper{metav1.LabelSelector{}}
}

// Label applies a {k,v} pair to the inner LabelSelector.

			testPods: []*v1.Pod{
				st.MakePod().Name("p").UID("p").Label("foo", "").Priority(highPriority).
					SpreadConstraint(1, "zone", v1.DoNotSchedule, st.MakeLabelSelector().Exists("foo").Obj(), nil, nil, nil, nil).
					SpreadConstraint(1, "hostname", v1.DoNotSchedule, st.MakeLabelSelector().Exists("foo").Obj(), nil, nil, nil, nil).
					Obj(),
			},
			initPods: []*v1.Pod{