docs: public Observable<NetworkInterfaceIPConfigurationInner> getAsync(String resourceGroupName, String networkInterfaceName, String ipConfigurationName) {
          return getWithServiceResponseAsync(resourceGroupName, networkInterfaceName, ipConfigurationName).map(new Func1<ServiceResponse<NetworkInterfaceIPConfigurationInner>, NetworkInterfaceIPConfigurationInner>() {
              @Override
              public NetworkInterfaceIPConfigurationInner call(ServiceResponse<NetworkInterfaceIPConfigurationInner> response) {
                  return response.body();
              }
          });
      }