def METHOD_NAME() -> None:
    # Please create the tables by placing this function before the multi-process tests.
    storage = get_storage()
    try:
        optuna.delete_study(study_name=_STUDY_NAME, storage=storage)
    except KeyError:
        pass
    N_TRIALS = 20
    study = optuna.create_study(study_name=_STUDY_NAME, storage=storage)
    # Run optimization
    study.optimize(objective, n_trials=N_TRIALS)
    trials = study.trials
    assert len(trials) == N_TRIALS
    _check_trials(trials)
    # Create a new study to confirm the study can load trial properly.
    loaded_study = optuna.load_study(study_name=_STUDY_NAME, storage=storage)
    _check_trials(loaded_study.trials)