code: def test_pickle(self, tmpdir):
      example = Example(a="A", b="B", c="C")
      attributes = ["a", "b"]
      save_dir = tmpdir.mkdir("save-dir")
      file_format = SerializationFormats.PICKLE
      self._validate_roundtrip(
          example, attributes, save_dir, file_format
      )
  
file_path: responsible-ai-toolbox/responsibleai/tests/tools/shared/test_attribute_serialization.py
imports: import pytest
  from responsibleai._tools.shared.attribute_serialization import SerializationExtensions, SerializationFormats, load_attributes, save_attributes
label_desc: Use image node_id 2 for calling the TestAttributeSerialization obj's underlying member method code with example usage: obj.test_pickle(tmpdir) without return types