code: def setUp(self):
      self.old = _testinternalcapi.get_optimizer()
      self.opt = _testinternalcapi.get_counter_optimizer()
      _testinternalcapi.set_optimizer(self.opt)
  
imports: import contextlib
  import opcode
  import textwrap
  import unittest
  import _testinternalcapi
label_desc: Use image node_id 1 for calling the TestExecutorInvalidation obj's underlying member method code with example usage: obj.setUp() without return types