message: Handled removing a tab
  Returned position none if tab not there anymore
diff: @@ -143,7 +143,7 @@ public class TabBarView extends ViewPager {
  @Override
  public int getItemPosition(@NonNull Object object) {
  - return tabs.indexOf(object);
  + return tabs.contains(object) ? tabs.indexOf(object) : POSITION_NONE;
  }
  @NonNull
  