code: def test_get_set_optimizer(self):
      old = _testinternalcapi.get_optimizer()
      opt = _testinternalcapi.get_counter_optimizer()
      try:
          _testinternalcapi.set_optimizer(opt)
          self.assertEqual(_testinternalcapi.get_optimizer(), opt)
          _testinternalcapi.set_optimizer(None)
          self.assertEqual(_testinternalcapi.get_optimizer(), None)
      finally:
          _testinternalcapi.set_optimizer(old)
  
imports: import contextlib
  import opcode
  import textwrap
  import unittest
  import _testinternalcapi
label_desc: Use image node_id 2 for calling the TestOptimizerAPI obj's underlying member method code with example usage: obj.test_get_set_optimizer() without return types