code: def test_clone(self):
      with self.assertRaises(NotImplementedError):
          self.classifier.clone_for_refitting()
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  import unittest
  import xgboost
  import numpy
  from art.estimators.classification.xgboost import XGBoostClassifier
  from tests.utils import TestBase, master_seed
label_desc: Use image node_id 5 for calling the TestXGBoostClassifierBoosterSoftprob obj's underlying member method code with example usage: obj.test_clone() without return types