def get_eval_set_result(
      self, app_name: str, eval_set_result_id: str
  ) -> EvalSetResult:
    """Returns an EvalSetResult identified by app_name and eval_set_result_id."""
    # Load the eval set result file data.
    maybe_eval_result_file_path = (
        os.path.join(
            self._get_eval_history_dir(app_name),
            eval_set_result_id,
        )
        + _EVAL_SET_RESULT_FILE_EXTENSION
    )
    if not os.path.exists(maybe_eval_result_file_path):
      raise ValueError(
          f"Eval set result `{eval_set_result_id}` does not exist."
      )
    with open(maybe_eval_result_file_path, "r") as file:
      eval_result_data = json.load(file)
    return EvalSetResult.model_validate_json(eval_result_data)
Returns an EvalSetResult identified by app_name and eval_set_result_id.
src/google/adk/evaluation/local_eval_set_results_manager.py