message: Changed to didSetProps
  Navigation A --> B then back to A. The keys change from [1,2] to [1] but the child scenes don't change! Still renders A and B because needs to render B until the pop animation completes.
  Moved the stack building into didSetProps because the keys prop changes every navigation
diff: [_scenes removeObjectForKey:((NVSceneView *) subview).sceneKey];
  }
  -- (void)didUpdateReactSubviews
  +- (void)didSetProps:(NSArray<NSString *> *)changedProps
  {
  + [super didSetProps:changedProps];
  NSInteger eventLag = _nativeEventCount - _mostRecentEventCount;
  if (eventLag != 0)
  return;
  