-- | Undocumented member.
umstGatewayARN :: Lens' UpdateMaintenanceStartTime Text
umstGatewayARN = lens _umstGatewayARN (\ s a -> s{_umstGatewayARN = a})
umstGatewayARN :: Lens' UpdateMaintenanceStartTime Text
umstGatewayARN = lens _umstGatewayARN (\ s a -> s{_umstGatewayARN = a})
umstGatewayARN = lens _umstGatewayARN (\ s a -> s{_umstGatewayARN = a})