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.

			pod: st.MakePod().Name("p").Label("foo", "").Label("bar", "").
				SpreadConstraint(1, "zone", v1.ScheduleAnyway, st.MakeLabelSelector().Obj(), nil, nil, nil, []string{"foo"}).
				SpreadConstraint(1, v1.LabelHostname, v1.ScheduleAnyway, st.MakeLabelSelector().Obj(), nil, nil, nil, []string{"bar"}).
				Obj(),
			existingPods: []*v1.Pod{
				st.MakePod().Name("p-a1").Node("node-a").Label("foo", "").Obj(),

	ignorePolicy       = v1.NodeInclusionPolicyIgnore
	honorPolicy        = v1.NodeInclusionPolicyHonor
	fooSelector        = st.MakeLabelSelector().Exists("foo").Obj()
	barSelector        = st.MakeLabelSelector().Exists("bar").Obj()

	taints = []v1.Taint{{Key: v1.TaintNodeUnschedulable, Value: "", Effect: v1.TaintEffectNoSchedule}}
)

func (p *criticalPaths) sort() {

			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{