code: def proc_response(self, resp, startidx=None):
          
  
          # If we're empty, bail out early
          if not self:
              return resp
  
          # Select appropriate starting index
          if startidx is None:
              startidx = len(self)
  
          for idx in range(startidx, -1, -1):
              _safe_call(self[idx], 'proc_response', resp)
  
          # Return the response we were passed
          return resp
docs: Post-process a response through all processors in the stack,
          in reverse order.  For convenience, returns the response
          passed to the method.
  
          The startidx argument is an internal interface only used by
          the proc_request() and proc_exception() methods to process a
          response through a subset of response processors.