code: def validate_resource(self, value):
          
  
          def do_backoff(*args, **kwargs):
              """Call self._test_connection with exponential backoff, for self._max_tries attempts"""
              attempts = 0
              while True:
                  try:
                      self._test_connection(*args, **kwargs)
                      break
                  except ValidationError:
                      wait_secs = min(self._max_wait, 2 ** attempts)
                      attempts += 1
                      if attempts < self._max_tries:
                          time.sleep(wait_secs)
                      else:
                          raise
  
          do_backoff(value)
docs: Validate the network resource with exponential backoff