code: def test_no_library(library):
      expected_library = (
          "torch or tensorflow" if library is None else library
      )
      X = [[0]]
      with pytest.raises(RuntimeError) as exc:
          AdversarialFairnessClassifier(
              backend=library,
              predictor_model=[5, 5],
              adversary_model=[2],
          ).fit(X, X, sensitive_features=X)
  
          assert str(exc.value) == _IMPORT_ERROR_MESSAGE.format(
              expected_library
          )
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_no_library(library) without return types