title: Check if a view is displayed in WebView with Espresso
body: <p>How can I check that a view (any view, TextBox, Button) is displayed in a WebView, using Espresso?</p>
  
  <p>I have tried with the following, but I'm not able to finish the check:</p>
  
  <pre><code>onWebView().withElement(findElement(ID, "username")).check( ... )
  </code></pre>