const runtime.waitReasonGarbageCollection

4 uses

	runtime (current package)
		mgc.go#L1374: 	casGToWaitingForSuspendG(curgp, _Grunning, waitReasonGarbageCollection)
		runtime2.go#L1228: 	waitReasonGarbageCollection                       // "garbage collection"
		runtime2.go#L1280: 	waitReasonGarbageCollection:     "garbage collection",
		runtime2.go#L1371: 	waitReasonGarbageCollection:     true,