public FEELFnResult<List<Object>> invoke( @ParameterName( "list" ) List list, @ParameterName( "item" ) Object[] items ) {
        return invoke((Object) list, items);
    }
@Test
    void invokeEmptyParams() {
        FunctionTestUtil.assertResultList(appendFunction.invoke(Collections.emptyList(), new Object[]{}),
                                          Collections.emptyList());
    }