def get_eval_case(
      self, app_name: str, eval_set_id: str, eval_case_id: str
  ) -> Optional[EvalCase]:
    """Returns an EvalCase if found, otherwise None."""
    eval_set = self.get_eval_set(app_name, eval_set_id)

    if not eval_set:
      return None

    eval_case_to_find = None

    # Look up the eval case by eval_case_id
    for eval_case in eval_set.eval_cases:
      if eval_case.eval_id == eval_case_id:
        eval_case_to_find = eval_case
        break

    return eval_case_to_find
Returns an EvalCase if found, otherwise None.
src/google/adk/evaluation/local_eval_sets_manager.py