title: View.findNavController() vs Fragment.findNavController()
body: <p>Anywhere in a <code>NavHostFragment</code> I can do <code>findNavController().navigateUp()</code></p>
  
  <p>Or, if in my Fragment I have a button to be used for navigation, I could do either:</p>
  
  <pre><code>editButton.setOnClickListener { v -&gt;
      v.findNavController().navigateUp()
  }
  </code></pre>
  
  <p>or</p>
  
  <pre><code>editButton.setOnClickListener {
      findNavController().navigateUp()
  }
  </code></pre>
  
  <p>Why would I use one extension function vs the other when setting up a button click listener in a Fragment?</p>