// is unavailable
func (h *HTTPExtender) IsIgnorable() bool {
	return h.ignorable
}

// SupportsPreemption returns true if an extender supports preemption.
// An extender should have preempt verb defined and enabled its own node cache.
func (h *HTTPExtender) SupportsPreemption() bool {
	return len(h.preemptVerb) > 0
}

// IsIgnorable returns a bool value indicating whether internal errors can be ignored.
func (f *FakeExtender) IsIgnorable() bool {
	return f.Ignorable
}

// SupportsPreemption returns true indicating the extender supports preemption.
func (f *FakeExtender) SupportsPreemption() bool {
	// Assume preempt verb is always defined.
	return true
}

// ProcessPreemption implements the extender preempt function.

	victimsMap := ev.CandidatesToVictimsMap(candidates)
	if len(victimsMap) == 0 {
		return candidates, nil
	}
	for _, extender := range extenders {
		if !extender.SupportsPreemption() || !extender.IsInterested(pod) {
			continue
		}
		nodeNameToVictims, err := extender.ProcessPreemption(pod, victimsMap, nodeLister)
		if err != nil {
			if extender.IsIgnorable() {