text: // Copyright 2020 Google LLC.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // +build !go1.13
  
  package http
  
  import "net/http"
  
  // clonedTransport returns the given RoundTripper as a cloned *http.Transport.
  // For versions of Go <1.13, this is not supported, so return nil.
  func clonedTransport(rt http.RoundTripper) *http.Transport {
  	return nil
  }
  