type sync.poolChainElt

6 uses

	sync (current package)
		poolqueue.go#L197: 	head *poolChainElt
		poolqueue.go#L201: 	tail atomic.Pointer[poolChainElt]
		poolqueue.go#L204: type poolChainElt struct {
		poolqueue.go#L217: 	next, prev atomic.Pointer[poolChainElt]
		poolqueue.go#L225: 		d = new(poolChainElt)
		poolqueue.go#L243: 	d2 := &poolChainElt{}