docs: public ExpressRouteGatewayInner createOrUpdate(String resourceGroupName, String expressRouteGatewayName, ExpressRouteGatewayInner putExpressRouteGatewayParameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, expressRouteGatewayName, putExpressRouteGatewayParameters).toBlocking().last().body();
      }