code: def test_params_keeper_update():
      params = {"a": 1, "b": 2, "c": 3}
      keeper = OperationParameters(**params)
      new_params = {"a": 1, "b": 3, "d": 4}
      keeper.update(**new_params)
      expected_params = {"a": 1, "b": 3, "c": 3, "d": 4}
      actual_params = keeper.to_dict()
      changed_params = keeper.changed_parameters.keys()
      assert actual_params == expected_params
      assert "a" not in changed_params
      assert "b" in changed_params
      assert "d" in changed_params
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_params_keeper_update() without return types