title: Custom Relationship Segue
body: <p>As scenes in Storyboards can not be connected using <code>IBOutlets</code>, segues would be a great way.</p>
  
  <p>While it's easy to create custom segues, there seems to be no way to create custom "Relationship Segues".</p>
  
  <p><img src="https://i.stack.imgur.com/YRMVW.png" alt="enter image description here"></p>
  
  <p>Is that so?
  Only Apple can create such segues (<code>UITabBarController</code>'s <code>viewControllers</code>, <code>UINavigationController</code>'s <code>rootController</code>, etc.)?</p>