var golang.org/x/tools/internal/event/keys.Metric

5 uses

	golang.org/x/tools/internal/event/keys (current package)
		standard.go#L21: 	Metric = NewTag("metric", "a metric event marker")

	golang.org/x/tools/internal/event
		event.go#L62: 		keys.Metric.New(),
		event.go#L70: 	return ev.Label(0).Key() == keys.Metric

	golang.org/x/tools/internal/event/core
		fast.go#L36: 		keys.Metric.New(),
		fast.go#L44: 		keys.Metric.New(),