@SuppressWarnings("rawtypes")
    private void notifyAdapterDataSetChanged() {
        if (viewPager != null) {
            final RecyclerView.Adapter adapter = viewPager.getAdapter();
            if (adapter != null) {
                adapter.notifyDataSetChanged();
            }
        }
    }
Set if the content is refreshable. Defaults to true if the Activity contains a {@link SwipeRefreshLayout}.
main/src/main/java/cgeo/geocaching/activity/TabbedViewPagerActivity.java