code: def test_multiclass_stress_test(self):
      self._classifier_stress_test()
  
imports: import itertools
  import unittest
  import numpy
  import pandas
  import pytest
  from coremltools._deps import _HAS_SKLEARN, _HAS_XGBOOST
  from coremltools.models.utils import _is_macos, _macos_version, evaluate_classifier, evaluate_classifier_with_probabilities
label_desc: Use image node_id 3 for calling the BoostedTreeMultiClassClassificationBostonHousingXGboostNumericTest obj's underlying member method code with example usage: obj.test_multiclass_stress_test() without return types