discovery/marathon/marathon.go
func newAuthTokenRoundTripper(token config_util.Secret, rt http.RoundTripper) (http.RoundTripper, error) {
	return &authTokenRoundTripper{token, rt}, nil
}
func newAuthTokenRoundTripper(token config_util.Secret, rt http.RoundTripper) (http.RoundTripper, error) {
	return &authTokenRoundTripper{token, rt}, nil
}
func newAuthTokenRoundTripper ( token config_util . Secret , rt http . RoundTripper ) ( http . RoundTripper , error ) { return & authTokenRoundTripper { token , rt } , nil }
// newAuthTokenRoundTripper adds the provided auth token to a request.
newAuthTokenRoundTripper adds the provided auth token to a request .