code: def test_unsupported_sampling_strategy(self):
      pytest.importorskip("sklearn")
      backend = "sklearn"
      with pytest.raises(UserConfigValidationException):
          self._get_exp(backend, method="unsupported")
  
file_path: DiCE/tests/test_dice.py
imports: import pytest
  from raiutils.exceptions import UserConfigValidationException
  import dice_ml
  from dice_ml.utils import helpers
label_desc: Use image node_id 6 for calling the TestBaseExplainerLoader obj's underlying member method code with example usage: obj.test_unsupported_sampling_strategy() without return types