type NodeInfoLister interface {
	// Returns the list of NodeInfos.
	List() ([]*schedulernodeinfo.NodeInfo, error)
	// Returns the list of NodeInfos of nodes with pods with affinity terms.
	HavePodsWithAffinityList() ([]*schedulernodeinfo.NodeInfo, error)
	// Returns the NodeInfo of the given node name.
	Get(nodeName string) (*schedulernodeinfo.NodeInfo, error)
}

type PodFilter func(*v1.Pod) bool

type PodLister interface {
	// Returns the list of pods.
	List(labels.Selector) ([]*v1.Pod, error)
	// This is similar to "List()", but the returned slice does not
	// contain pods that don't pass `podFilter`.
	FilteredList(podFilter PodFilter, selector labels.Selector) ([]*v1.Pod, error)
}

type SharedLister interface {
	Pods() PodLister
	NodeInfos() NodeInfoLister
}