code: public Observable<List<AvailableCulture>> listSupportedCulturesAsync() {
          return listSupportedCulturesWithServiceResponseAsync().map(new Func1<ServiceResponse<List<AvailableCulture>>, List<AvailableCulture>>() {
              @Override
              public List<AvailableCulture> call(ServiceResponse<List<AvailableCulture>> response) {
                  return response.body();
              }
          });
      }
docs: Gets the supported application cultures.
  
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the List&lt;AvailableCulture&gt; object