title: How to activate RouteReuseStrategy only for specific routes
body: <p>Is there a way to implement <code>RouteReuseStrategy</code> only for specific routes? </p>
  
  <p>Meaning each route with children, getting its own custom implementation of <code>RouteReuseStrategy</code>, and whose methods only fire when a route in a specific 'tree' is activated.</p>
  
  <p>I currently use the code from <a href="https://stackoverflow.com/questions/41280471/how-to-implement-routereusestrategy-shoulddetach-for-specific-routes-in-angular">this</a> answer, but I want to expand it with the above logic if possible.</p>