docs: @Override
    protected void postGlobal() {
      assert(_res.model_info().get_params().replicate_training_data);
      super.postGlobal();
      _res.model_info().div(_res._chunk_node_count); //model averaging
      _res.model_info().add_processed_global(_res.model_info().get_processed_local()); //switch from local counters to global counters
      _res.model_info().set_processed_local(0l);
    }