code: def test_conformal_standard():
      """Tests standard use of the conformal intervals adapter."""
      y = load_airline()
      forecaster = NaiveForecaster(strategy="drift")
  
      conformal_forecaster = ConformalIntervals(forecaster)
      conformal_forecaster.fit(y, fh=[1, 2, 3])
      pred_int = conformal_forecaster.predict_interval()
  
      assert check_is_mtype(
          pred_int, "pred_interval", "Proba", msg_return_dict="list"
      )
  
file_path: sktime/sktime/forecasting/tests/test_conformal.py
imports: import pytest
  from sktime.datasets import load_airline
  from sktime.datatypes import check_is_mtype
  from sktime.forecasting.conformal import ConformalIntervals
  from sktime.forecasting.naive import NaiveForecaster
  from sktime.tests.test_switch import run_test_for_class
label_desc: Use image node_id 1 for calling a global function with example usage: test_conformal_standard() without return types