const runtime.traceEvGoSleep

3 uses

	runtime (current package)
		mgcscavenge.go#L241: 	goparkunlock(&scavenge.lock, waitReasonSleep, traceEvGoSleep, 2)
		time.go#L193: 	gopark(resetForSleep, unsafe.Pointer(t), waitReasonSleep, traceEvGoSleep, 1)
		trace.go#L42: 	traceEvGoSleep           = 19 // goroutine calls Sleep [timestamp, stack]