title: How to use Navigation in JetPack in Anko?
body: <p><a href="https://i.stack.imgur.com/SyfNd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SyfNd.png" alt="enter image description here"></a></p>
  
  <p>I do not know how to declare navHostFragment in anko. It is not a view. More importantly, how to declare the last two attrs   app:xxx?</p>