code: def test_parameters__iadd__(parameters):
      """Test the __iadd__ magic method."""
      pars, exp_attr_values_A, exp_attr_values_B = parameters
  
      msg = r"'other' is not a Parameters object"
      with pytest.raises(ValueError, match=msg):
          pars += "other"
  
      pars2 = lmfit.Parameters()
      pars2.add_many(
          ("c", 1.0, True, None, None, None),
          ("d", 2.0, True, None, None, None),
      )
      exp_attr_values_C = (
          "c",
          1,
          True,
          -np.inf,
          np.inf,
          None,
          None,
          None,
      )
      exp_attr_values_D = (
          "d",
          2,
          True,
          -np.inf,
          np.inf,
          None,
          None,
          None,
      )
  
      pars += pars2
  
      assert_parameter_attributes(pars["a"], exp_attr_values_A)
      assert_parameter_attributes(pars["b"], exp_attr_values_B)
      assert_parameter_attributes(pars["c"], exp_attr_values_C)
      assert_parameter_attributes(pars["d"], exp_attr_values_D)
  
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 11 for calling a global function with example usage: test_parameters__iadd__(parameters) without return types