title: How to custom in storyboard my view controller's UINavigationItem that is instantiated by identifier and pushed onto navigation stack?
body: <p>In storyboard I have <code>UINavigationController</code> with some controllers. </p>
  
  <p><img src="https://i.stack.imgur.com/vkwar.png" alt="enter image description here">
  Within the last one I have a button <code>Button</code>. When I tap that button I instantiate another view controller from current storyboard:</p>
  
  <p><img src="https://i.stack.imgur.com/2zVwo.png" alt="enter image description here"></p>
  
  <p>But here I would like to custom my <code>UINavigationItem</code> with my custom <code>UIBarButtonItem</code>s. How to do this here in storyboard?</p>