title: How to rewrite this constructor to calculate a class filed using inner static value?
body: <p>How to change this constructor so that the <code>link</code> would be <code>_host + link</code> ?</p>
  <pre><code>class Profile {
    static final String _host = 'http://github.com';
  
    Profile(this.link, this.id, this.photo);
  
    final link;
    final id;
    final photo;
  
    @override
    String toString() {
      return '$link, $id, $photo';
    }
  }
  </code></pre>