code: public Observable<ExpressRoutePortsLocationInner> getAsync(String locationName) {
          return getWithServiceResponseAsync(locationName).map(new Func1<ServiceResponse<ExpressRoutePortsLocationInner>, ExpressRoutePortsLocationInner>() {
              @Override
              public ExpressRoutePortsLocationInner call(ServiceResponse<ExpressRoutePortsLocationInner> response) {
                  return response.body();
              }
          });
      }
docs: Retrieves a single ExpressRoutePort peering location, including the list of available bandwidths available at said peering location.
  
  @param locationName Name of the requested ExpressRoutePort peering location.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ExpressRoutePortsLocationInner object