You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: element.rs
    path of file: ./repos/scraper/src/element_ref
    
    the code of the file until where you have to start completion: use html5ever::Namespace
    
    fn test_is_link() {
        let html = "<link href='https://www.example.com'>";
        let fragment = Html::parse_fragment(html);
        let sel = Selector::parse("link").unwrap();
        let element = fragment.select(&sel).next().unwrap();
        assert!(element.is_link());

        let html = "<p>hey there</p>";
        let fragment = Html::parse_fragment(html);
        let sel = Selector::parse("p").unwrap();
        let element = fragment.select(&sel).next().unwrap();
        assert!(!element.is_link());
    }