code: def mdata_x(request):
      return get_reference_data()["X"][request.param]
  
imports: from os.path import join, dirname
  from typing import Callable, Dict, Tuple, Union, Type
  import numpy
  from numpy.testing import assert_array_almost_equal, assert_equal, assert_allclose
  import pytest
  from pytest import raises
  from scipy.fft._pocketfft.realtransforms import dct, idct, dst, idst, dctn, idctn, dstn, idstn
label_desc: Use image node_id 4 for calling a global function with example usage: mdata_x(request) and returns: get_reference_data