          self.ensure_is_throttled(MockView, 200)
  
      def ensure_response_header_contains_proper_throttle_field(self, view, expected_headers):
          """
          Ensure the response returns an X-Throttle field with status and next attributes
          set properly.
          """
          request = self.factory.get('/')
          for timer, expect in expected_headers:
              self.set_throttle_timer(view, timer)
 
</s> remove                 self.assertEqual(response['X-Throttle-Wait-Seconds'], expect)
 </s> add  </s> remove                 self.assertFalse('X-Throttle-Wait-Seconds' in response)
 </s> add  </s> remove         self.assertFalse('X-Throttle-Wait-Seconds' in response)
 </s> add  </s> remove         self.assertFalse('X-Throttle-Wait-Seconds' in response)
 </s> add  </s> remove             headers['X-Throttle-Wait-Seconds'] = '%d' % exc.wait
 </s> add 
        Ensure the response returns an Retry-After field with status and next attributes
          self.ensure_is_throttled(MockView, 200)
  
      def ensure_response_header_contains_proper_throttle_field(self, view, expected_headers):
          """
        Ensure the response returns an Retry-After field with status and next attributes
          set properly.
          """
          request = self.factory.get('/')
          for timer, expect in expected_headers:
              self.set_throttle_timer(view, timer)
keep keep keep keep replace keep keep keep keep keep
 Throttles now use Retry-After header and no longer support the custom style 
tests/test_throttling.py