code: def add_expected_saved_initial_values(
      self, config_vars, expected_vars
  ):
      # Ensure that the initial values for all modified config vars
      # are also saved with modified keys.
      expected_vars.update(
          ("_OSX_SUPPORT_INITIAL_" + k, config_vars[k])
          for k in config_vars
          if config_vars[k] != expected_vars[k]
      )
  
imports: import os
  import platform
  import stat
  import sys
  import unittest
  from test.support import os_helper
  import _osx_support
label_desc: Use image node_id 2 for calling the Test_OSXSupport obj's underlying member method code with example usage: obj.add_expected_saved_initial_values(config_vars, expected_vars) without return types