code: def _add_single_session_to_to_ordered_dict(self, d, dataset_index, recommended_only):
          
          for model_index, model in enumerate(self.models):
              # determine if model should be presented, or if a null-model should
              # be presented (if no model is recommended.)
              show_null = False
              if recommended_only:
                  if self.recommendation_enabled:
                      if self.recommended_model is None:
                          if model_index == 0:
                              show_null = True
                          else:
                              continue
                      elif self.recommended_model == model:
                          pass
                      else:
                          continue
                  else:
                      if model_index == 0:
                          show_null = True
                      else:
                          continue
  
              d["dataset_index"].append(dataset_index)
              d["doses_dropped"].append(self.doses_dropped)
              model._to_df(d, model_index, show_null)
docs: Save a single session to an ordered dictionary.