code: public void enter(@NonNull ID id, boolean withAnimation) {
          if (GestureDebug.isDebugAnimator()) {
              Log.d(TAG, "Enter requested for " + id + ", with animation = " + withAnimation);
          }
  
          enterWithAnimation = withAnimation;
          request(id);
      }
docs: Requests 'from' and 'to' views for given ID and starts enter animation when views are ready.
  
  @param id Item ID for views lookup
  @param withAnimation Whether to animate entering or immediately jump to entered state
  @see ViewsCoordinator