var runtime.uniqueMapCleanup

5 uses

	runtime (current package)
		mgc.go#L1755: var uniqueMapCleanup chan struct{} // for unique
		mgc.go#L1779: 	uniqueMapCleanup = make(chan struct{}, 1)
		mgc.go#L1782: 			<-uniqueMapCleanup
		mgc.go#L1800: 	if uniqueMapCleanup != nil {
		mgc.go#L1802: 		case uniqueMapCleanup <- struct{}{}: