title: Xcode project inside project
body: <p>I'm taking over some project of a colleague that is on holidays now.</p>
  
  <p>Other projects have gone fine, but in this particular one, I have found a project inside a project, like using a framework I guess.</p>
  
  <p>So what is the name of this technique?</p>
  
  <p><img src="https://i.stack.imgur.com/p0WWM.png" alt="project inside project tree image"></p>
  
  <p>How to insert and interact with it? just import?</p>