var golang.org/x/pkgsite/cmd/frontend.proxyURL

2 uses

	golang.org/x/pkgsite/cmd/frontend (current package)
		main.go#L39: 	proxyURL       = flag.String("proxy_url", "https://proxy.golang.org", "Uses the module proxy referred to by this URL "+
		main.go#L75: 	proxyClient, err := proxy.New(*proxyURL)