func newPRQ() peerRequestQueue {
	return &prq{
		taskMap:  make(map[string]*peerRequestTask),
		partners: make(map[peer.ID]*activePartner),
		pQueue:   pq.New(partnerCompare),
	}
}
func newActivePartner() *activePartner {
	return &activePartner{
		taskQueue:    pq.New(wrapCmp(V1)),
		activeBlocks: make(map[key.Key]struct{}),
	}
}