code: def retrieval_function(
      key: Optional[int] = None, value: Optional[str] = None
  ) -> str:
      return str(hash(str(key)))
  
file_path: sagemaker-python-sdk/tests/unit/sagemaker/utilities/test_cache.py
imports: from __future__ import absolute_import
  from typing import Optional, Union
  from mock.mock import MagicMock, patch
  import pytest
  from sagemaker.utilities import cache
  import datetime
label_desc: Use image node_id 1 for calling a global function with example usage: retrieval_function(key, value) and returns: str