@NotNull
    default Collection<? extends IndexableIteratorBuilder> getExistingEntityIteratorBuilder(@NotNull E entity,
                                                                                            @NotNull Project project) {
      return getAddedEntityIteratorBuilders(entity, project);
    }
@NotNull
    default Collection<? extends IndexableIteratorBuilder> getExistingEntityIteratorBuilder(@NotNull E entity,
                                                                                            @NotNull Project project)