code: def test_parameters_deepcopy_subclass():
      """Test that a subclass of parameters is preserved when performing a deepcopy"""
  
      class ParametersSubclass(lmfit.Parameters):
          pass
  
      parameters = ParametersSubclass()
      assert isinstance(parameters, ParametersSubclass)
  
      parameterscopy = deepcopy(parameters)
      assert isinstance(parameterscopy, ParametersSubclass)
  
imports: from copy import copy, deepcopy
  import os
  import pickle
  import numpy
  from numpy.testing import assert_allclose
  import pytest
  import lmfit
  from lmfit.models import VoigtModel
label_desc: Use image node_id 7 for calling a global function with example usage: test_parameters_deepcopy_subclass() without return types