new_contents: # --------------------------------------------------------------------------
  #
  # Copyright (c) Microsoft Corporation. All rights reserved.
  #
  # The MIT License (MIT)
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the ""Software""), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  #
  # --------------------------------------------------------------------------
  
  def test_example_raw_response_hook():
      def callback(response):
          response.http_response.status_code = 200
          response.http_response.headers["custom_header"] = "CustomHeader"
  
      from azure.core.pipeline import Pipeline
      from azure.core.pipeline.policies import RedirectPolicy, UserAgentPolicy
      from azure.core.pipeline.transport import RequestsTransport, HttpRequest
      from azure.core.pipeline.policies import CustomHookPolicy
  
      request = HttpRequest("GET", "https://bing.com")
      policies = [
          CustomHookPolicy(raw_response_hook=callback)
      ]
  
      with Pipeline(transport=RequestsTransport(), policies=policies) as pipeline:
          response = pipeline.run(request)
          assert response.http_response.status_code == 200
          assert response.http_response.headers["custom_header"] == "CustomHeader"
  
subject: add sample for raw_response_hook (#19985)