const runtime.gcTriggerCycle

4 uses

	runtime (current package)
		mgc.go#L555: 	gcStart(gcTrigger{kind: gcTriggerCycle, n: n + 1})
		mgc.go#L700: 	gcTriggerCycle
		mgc.go#L720: 	case gcTriggerCycle:
		mgc.go#L796: 	work.userForced = trigger.kind == gcTriggerCycle