const runtime.waitReasonGarbageCollection

4 uses

	runtime (current package)
		mgc.go#L1358: 	casGToWaitingForSuspendG(curgp, _Grunning, waitReasonGarbageCollection)
		runtime2.go#L1227: 	waitReasonGarbageCollection                       // "garbage collection"
		runtime2.go#L1279: 	waitReasonGarbageCollection:     "garbage collection",
		runtime2.go#L1370: 	waitReasonGarbageCollection:     true,