const runtime.traceBlockSleep

3 uses

	runtime (current package)
		mgcscavenge.go#L504: 		goparkunlock(&s.lock, waitReasonSleep, traceBlockSleep, 2)
		time.go#L195: 	gopark(resetForSleep, unsafe.Pointer(t), waitReasonSleep, traceBlockSleep, 1)
		trace.go#L108: 	traceBlockSleep                            = traceEvGoSleep