public FEELFnResult<List<Object>> invoke( @ParameterName( "list" ) List list, @ParameterName( "item" ) Object[] items ) {
        return invoke((Object) list, items);
    }
@Test
    void invokeAppendSomething() {
        FunctionTestUtil.assertResultList(appendFunction.invoke(Collections.emptyList(), new Object[]{"test"}),
                                          List.of("test"));
        FunctionTestUtil.assertResultList(appendFunction.invoke(List.of("test"), new Object[]{"test2"}),
                                          Arrays.asList("test", "test2"));
        FunctionTestUtil.assertResultList(appendFunction.invoke(List.of("test"), new Object[]{"test2", "test3"}),
                                          Arrays.asList("test", "test2", "test3"));
    }