Get page url from RetrieveContentOfContentTypes

I have been trying to retrieve some content and the url of web pages in XbyK for multiple content types using RetrieveContentOfContentTypes.

It threw error if I use "IWebPageFieldsSource" as Model of the final retrieved results.

    var contentTypes = new[] { NewsArticle.CONTENT_TYPE_NAME, ContentPage.CONTENT_TYPE_NAME };

    var parameters = new RetrieveContentOfContentTypesParameters
    {
        LinkedItemsMaxLevel = 1,
        IncludeUrlPath = true,
    };

    var items = await contentRetriever.RetrieveContentOfContentTypes<IWebPageFieldsSource>(
        contentTypes,
        parameters,
        query => query.Where(where =>
            where.WhereIn(nameof(IContentQueryDataContainer.ContentItemGUID), ids)
        ),
        cacheService.RetrievalCacheSettings(
            $"{nameof(CoreContentModel)}|multi:{string.Join(',', contentTypes)}|ids:{string.Join(',', ids)}"
        ), 
        cancellationToken);

Furthermore, even if I use "IContentItemFieldsSource" as Model of the final retrieved results, it throws error. However, if I map to custom model it works fine, but I am not able to get the url of the page. Is there some ways to get the url of the page using RetrieveContentOfContentTypes.