docs: public Observable<Page<AssetFilterInner>> listAsync(final String resourceGroupName, final String accountName, final String assetName) {
          return listWithServiceResponseAsync(resourceGroupName, accountName, assetName)
              .map(new Func1<ServiceResponse<Page<AssetFilterInner>>, Page<AssetFilterInner>>() {
                  @Override
                  public Page<AssetFilterInner> call(ServiceResponse<Page<AssetFilterInner>> response) {
                      return response.body();
                  }
              });
      }