type sync.poolChain

5 uses

	sync (current package)
		pool.go#L62: 	shared  poolChain // Local P can pushHead/popHead; any P can popTail.
		poolqueue.go#L194: type poolChain struct {
		poolqueue.go#L228: func (c *poolChain) pushHead(val any) {
		poolqueue.go#L258: func (c *poolChain) popHead() (any, bool) {
		poolqueue.go#L271: func (c *poolChain) popTail() (any, bool) {