code: def test_api_classes():
      expected_exposed_classes = [
          "DataFrameIterator",
          "DirectoryIterator",
          "ImageDataGenerator",
          "Iterator",
          "NumpyArrayIterator",
      ]
      for _class in expected_exposed_classes:
          assert hasattr(image, _class)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_api_classes() without return types