docs: public Observable<RegistryPoliciesInner> listPoliciesAsync(String resourceGroupName, String registryName) {
          return listPoliciesWithServiceResponseAsync(resourceGroupName, registryName).map(new Func1<ServiceResponse<RegistryPoliciesInner>, RegistryPoliciesInner>() {
              @Override
              public RegistryPoliciesInner call(ServiceResponse<RegistryPoliciesInner> response) {
                  return response.body();
              }
          });
      }