code: def _get_ordered_access_keys(self):
          "Return ordered access keys for inspection. Used for testing."
          self.access_log_lock.acquire()
          r = [e.key for e in self.access_log if e.is_valid]
          self.access_log_lock.release()
  
          return f _get_ordered_access_keys(self):
          "Return ordered access keys for inspection. Used for testing."
          self.access_log_lock.acquire()
          r = [e.key for e in self.access_log if e.is_valid]
          self.access_log_lock.release()
  
          return r
docs: Return ordered access keys for inspection. Used for testing.