code: def test_Sarimax_sarimax_params_are_stored_during_initialization():
      """
      Test if `sarimax._sarimax_params` are stored correctly during initialization.
      """
  
      sarimax = Sarimax()
      results = sarimax._sarimax_params
  
      expected_params = {
          "order": (1, 0, 0),
          "seasonal_order": (0, 0, 0, 0),
          "trend": None,
          "measurement_error": False,
          "time_varying_regression": False,
          "mle_regression": True,
          "simple_differencing": False,
          "enforce_stationarity": True,
          "enforce_invertibility": True,
          "hamilton_representation": False,
          "concentrate_scale": False,
          "trend_offset": 1,
          "use_exact_diffuse": False,
          "dates": None,
          "freq": None,
          "missing": "none",
          "validate_specification": True,
          "method": "lbfgs",
          "maxiter": 50,
          "start_params": None,
          "disp": False,
          "sm_init_kwargs": {},
          "sm_fit_kwargs": {},
          "sm_predict_kwargs": {},
      }
  
      assert isinstance(results, dict)
      assert results == expected_params
  
imports: import re
  import pytest
  import numpy
  import pandas
  from sklearn.exceptions import NotFittedError
  from skforecast.Sarimax import Sarimax
  from statsmodels.tsa.statespace.sarimax import SARIMAX
  from statsmodels.tsa.statespace.sarimax import SARIMAXResults
  from statsmodels.tsa.statespace.sarimax import SARIMAXResultsWrapper
  from .fixtures_Sarimax import y
  from .fixtures_Sarimax import y_lw
  from .fixtures_Sarimax import exog
  from .fixtures_Sarimax import exog_lw
  from .fixtures_Sarimax import exog_predict
  from .fixtures_Sarimax import exog_lw_predict
  from .fixtures_Sarimax import y_datetime
  from .fixtures_Sarimax import exog_datetime
  from .fixtures_Sarimax import exog_predict_datetime
label_desc: Use image node_id 2 for calling a global function with example usage: test_Sarimax_sarimax_params_are_stored_during_initialization() without return types