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

3 uses

	golang.org/x/tools/internal/event/keys (current package)
		standard.go#L11: 	Label = NewTag("label", "a label context marker")

	golang.org/x/tools/internal/event
		event.go#L76: 		keys.Label.New(),
		event.go#L84: 	return ev.Label(0).Key() == keys.Label