code: def send(self, request, stem=None):
          
          if stem is not None:
              request.url = request.url + "/" + stem.lstrip("/")
  
          prepped = self.session.prepare_request(request)
          settings = self.session.merge_environment_settings(url=prepped.url,
                                                             proxies={},
                                                             stream=None,
                                                             verify=None,
                                                             cert=None)
  
          return self.session.send(prepped, **settings)
docs: Prepare and send a request
  
          Arguments:
              request: a Request object that is not yet prepared
              stem: a path to append to the root URL
  
          Returns:
              The response to the request