code: def test_stationarity_kpss():
      """Test StationarityKPSS on airline data, identical to docstring example."""
      X = load_airline()
      sty_est = StationarityKPSS()
      sty_est.fit(X)
      assert not sty_est.get_fitted_params()["stationary"]
  
imports: import pytest
  from sktime.datasets import load_airline
  from sktime.param_est.stationarity import StationarityADF, StationarityKPSS
  from sktime.utils.validation._dependencies import _check_estimator_deps
label_desc: Use image node_id 2 for calling a global function with example usage: test_stationarity_kpss() without return types