const runtime.traceBlockGCMarkAssist

3 uses

	runtime (current package)
		mgcmark.go#L822: 	goparkunlock(&work.assistQueue.lock, waitReasonGCAssistWait, traceBlockGCMarkAssist, 2)
		traceruntime.go#L99: 	traceBlockGCMarkAssist
		traceruntime.go#L119: 	traceBlockGCMarkAssist:       "GC mark assist wait for work",