code: def test_parameters_changer_unknown_operation_correct():
      changer = ParametersChanger(
          "nonexistent_operation", "nonexistent_param"
      )
      empty_output = changer.get_new_operation_params()
      assert empty_output is None
  
label_desc: Use image node_id 3 for calling a global function with example usage: test_parameters_changer_unknown_operation_correct() without return types