Magellan 1.x Implementing Tabs or other "Screens into a Screen" UI, using ScreenGroup

Implementing Tabs, or any other "Screens into a Screen" UI should be pretty easy using ScreenGroup

Example: Tabs

BaseTabsScreen.java

public class BaseTabsScreen extends ScreenGroup<Screen, TabsView> {

  public BaseTabsScreen(List<Screen> screens) {
    super(screens);
  }

  @Override
  protected TabsView createView(Context context) {
    return new TabsView(context, getScreens());
  }

  @Override
  protected void onShow(Context context) {
    super.onShow(context);
    for (Screen screen : getScreens()) {
      getView().addTabView(screen.getView());
    }
  }

}

TabsView.java

public class TabsView extends BaseScreenView<BaseTabsScreen> {

  @BindView(R.id.tabLayout) TabLayout tabLayout;
  @BindView(R.id.pager) ViewPager pager;

  public TabsView(Context context) {
    super(context);
  }

  public TabsView(Context context, List<? extends Screen> tabScreens) {
    super(context);
    inflate(getContext(), R.layout.tabs, this);
    bind(this);
    initPager(context, tabScreens);
  }

  @VisibleForTesting
  public TabsView(Context context, List<? extends Screen> tabScreens, TabLayout tabLayout, ViewPager pager) {
    super(context);
    this.tabLayout = tabLayout;
    this.pager = pager;
    initPager(context, tabScreens);
  }

  private void initPager(Context context, List<? extends Screen> tabScreens) {
    TabsAdapter tabsAdapter = new TabsAdapter(context, tabScreens);
    pager.setAdapter(tabsAdapter);
    pager.setOffscreenPageLimit(Integer.MAX_VALUE);
    pager.addOnPageChangeListener(new TabLayoutOnPageChangeListener(tabLayout));

    tabLayout.setTabsFromPagerAdapter(tabsAdapter);
    tabLayout.setOnTabSelectedListener(new ViewPagerOnTabSelectedListener(pager));
  }

  public void addTabView(View view) {
    pager.addView(view);
  }

}

TabsAdapter.java

public class TabsAdapter extends PagerAdapter {

  private final Context context;
  private final List<? extends Screen> tabScreens;

  public TabsAdapter(Context context, List<? extends Screen> tabScreens) {
    this.context = context;
    this.tabScreens = tabScreens;
  }

  @Override
  public Object instantiateItem(ViewGroup container, int position) {
    return tabScreens.get(position).getView();
  }

  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {}

  @Override
  public int getCount() {
    return tabScreens.size();
  }

  @Override
  public boolean isViewFromObject(View v1, Object v2) {
    return v1 == v2;
  }

  @Override
  public CharSequence getPageTitle(int position) {
    return tabScreens.get(position).getTitle(context);
  }

}