//go:build !with_utls package tls import ( "github.com/sagernet/sing-box/adapter" "github.com/sagernet/sing-box/option" E "github.com/sagernet/sing/common/exceptions" ) func newUTLSClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (Config, error) { return nil, E.New(`uTLS is not included in this build, rebuild with -tags with_utls`) }