if restConfig.Proxy != nil {
		upgrader, err = spdyStream.NewRoundTripperWithProxy(tlsConfig, restConfig.Proxy)
		if err != nil {
			return nil, nil, err
		}
	} else {
		upgrader, err = spdyStream.NewRoundTripper(tlsConfig)
		if err != nil {
			return nil, nil, err
		}
	}
	wrapper, err := rest.HTTPWrappersForConfig(restConfig, upgrader)
	if err != nil {

}

var _ utilnet.TLSClientConfigHolder = &SpdyRoundTripper{}
var _ httpstream.UpgradeRoundTripper = &SpdyRoundTripper{}
var _ utilnet.Dialer = &SpdyRoundTripper{}

// NewRoundTripper creates a new SpdyRoundTripper that will use the specified
// tlsConfig.
func NewRoundTripper(tlsConfig *tls.Config) (*SpdyRoundTripper, error) {
	return NewRoundTripperWithConfig(RoundTripperConfig{
		TLS:              tlsConfig,
		UpgradeTransport: nil,
	})
}

				t.Fatalf("error creating request: %s", err)
			}
			req, err := http.NewRequest("GET", server.URL, nil)
			if err != nil {
				t.Fatalf("error creating request: %s", err)
			}

			spdyTransport, err := NewRoundTripper(testCase.clientTLS)
			if err != nil {
				t.Fatalf("error creating SpdyRoundTripper: %v", err)
			}

			var proxierCalled bool
			var proxyCalledWithHost string
			var proxyCalledWithAuth bool

	expectedContainerName := "baz"

	url := fw.testHTTPServer.URL + "/exec/" + podNamespace + "/" + podName + "/" + expectedContainerName + "?c=ls&c=-a&" + api.ExecStdinParam + "=1"

	upgradeRoundTripper, err := spdy.NewRoundTripper(&tls.Config{})
	if err != nil {
		t.Fatalf("Error creating SpdyRoundTripper: %v", err)
	}
	c := &http.Client{Transport: upgradeRoundTripper}

	resp, err := c.Do(makeReq(t, "POST", url, "v4.channel.k8s.io"))