const runtime.traceBlockGCMarkAssist

3 uses

	runtime (current package)
		mgcmark.go#L754: 	goparkunlock(&work.assistQueue.lock, waitReasonGCAssistWait, traceBlockGCMarkAssist, 2)
		traceruntime.go#L97: 	traceBlockGCMarkAssist
		traceruntime.go#L117: 	traceBlockGCMarkAssist:       "GC mark assist wait for work",