// is found in the map. It returns nil otherwise.
func (u *UnschedulablePods) get(pod *v1.Pod) *framework.QueuedPodInfo {
	podKey := u.keyFunc(pod)
	if pInfo, exists := u.podInfoMap[podKey]; exists {
		return pInfo
	}
	return nil
}

// clear removes all the entries from the unschedulable podInfoMap.
func (u *UnschedulablePods) clear() {