title: Spread-chain group of elements with ConstraintLayout
body: <p>I'm having an issue to spread-chain 2 groups of elements with Constraint Layout. I understand the goal of this new layout is to use a flat hierarchy so I'd like to avoid putting my elements inside a child layouts. </p>
  
  <p>I looked at some awesome resources like constraintlayout.com but couldn't figure out how to make it work for my specific case - which I think can be common..</p>
  
  <p>Here is an image of what I'd like to achieve. In red, spaces 1, 2 and 3 need to have the same height (just like spread chain).</p>
  
  <p><a href="https://i.stack.imgur.com/fovLl.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/fovLl.jpg" alt="a representation of what I want"></a></p>
  
  <p>Thank you for your attention :)</p>