code: def setUp(self):
      cupy._core._optimize_config._clear_all_contexts_cache()
  
imports: import os
  import tempfile
  import unittest
  from unittest import mock
  import pytest
  import cupy
  from cupy import testing
  from cupy._core import _accelerator
label_desc: Use image node_id 1 for calling the TestOptimize obj's underlying member method code with example usage: obj.setUp() without return types