title: How to access the instance of another component?
body: <p>I'm not necessarily talking about a child component, so <code>ViewChild</code> isn't an option.</p>
  
  <p>Is it possible to inject any component into another component? I found <a href="https://stackoverflow.com/questions/32617293/angular2-inject-components-into-other-components">this question</a>, but it's outdated.</p>
  
  <p>What's the best way to achieve this?</p>