code: public ExpressRoutePortInner createOrUpdate(String resourceGroupName, String expressRoutePortName, ExpressRoutePortInner parameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, expressRoutePortName, parameters).toBlocking().last().body();
      }
docs: Creates or updates the specified ExpressRoutePort resource.
  
  @param resourceGroupName The name of the resource group.
  @param expressRoutePortName The name of the ExpressRoutePort resource.
  @param parameters Parameters supplied to the create ExpressRoutePort operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the ExpressRoutePortInner object if successful.