title: Navigation bar back button custom icon?
body: <p>Is it possible to change the navigation bar (image bellow for reference) back button icon programmatically? Let's say in a certain moment I'd like to change it to be the arrow down icon (normally used to hide the soft input) then change it back to the default after some user interaction.</p>
  
  <p><a href="https://i.stack.imgur.com/9Qwwt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9Qwwt.png" alt="navigation bar"></a></p>