public FEELFnResult<List<Object>> invoke( @ParameterName( "list" ) List list, @ParameterName( "item" ) Object[] items ) {
        return invoke((Object) list, items);
    }
@Test
    void invokeAppendNothing() {
        FunctionTestUtil.assertResultList(appendFunction.invoke(List.of("test"), new Object[]{}), List.of("test"));
        FunctionTestUtil.assertResultList(appendFunction.invoke(Arrays.asList("test", "test2"), new Object[]{}),
                                          Arrays.asList("test", "test2"));
    }