@SuppressWarnings("unchecked")
  @NotNull
  private Class<D> getEmptyFlavorForBackwardCompatibility() {
    LOG.warn("getFlavorDataClass is not implemented, please implement it");
    return (Class<D>)PyFlavorData.Empty.class;
  }
@SuppressWarnings("unchecked")
  @NotNull
  private Class<D> getEmptyFlavorForBackwardCompatibility()