title: How to center two elements with auto layout?
body: <p>How to center two middle squares with autolayout to preserve equal spaces between all of them?</p>
  
  <p><img src="https://i.imgur.com/XRIE5bm.png" alt="pic"></p>
  
  <p>Actually, i can outlet constraints and set it with computations involving container width and so on, but maybe there is some more smart way?</p>