docs: public ExpressRouteGatewayInner beginCreateOrUpdate(String resourceGroupName, String expressRouteGatewayName, ExpressRouteGatewayInner putExpressRouteGatewayParameters) {
          return beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, expressRouteGatewayName, putExpressRouteGatewayParameters).toBlocking().single().body();
      }