title: How to handle click in a nested RecyclerView
body: <p>Can someone explain the logic on how to handle this matter:</p>
  
  <p>I have a fragment that after a WebSocket call inflates 2 Recyclerviews. </p>
  
  <p>Child Recyclerview is nested to Parent Recyclerview and the parent adapter calls the child adapter. 
  I want to put an Interface for a click listener which handles the click in the Child Items in the Fragment.</p>
  
  <p>Where should I put the interface and which class should implement it?</p>