code: def refresh(self, id_or_uri, timeout=-1):
          
          uri = self._client.build_uri(id_or_uri) + "/refresh"
          return self._client.update_with_zero_body(uri, timeout=timeout)
docs: The Refresh action reclaims the top-of-rack switches in a logical switch.
  
          Args:
              id_or_uri:
                  Can be either the Logical Switch ID or URI
              timeout:
                  Timeout in seconds. Wait for task completion by default. The timeout does not abort the operation
                  in OneView, just stop waiting for its completion.
  
          Returns:
              dict: The Logical Switch