@Override
    public void onDestroy() {
        createDisposables.clear();
        if (cache != null) {
            cache.setChangeNotificationHandler(null);
        }
        super.onDestroy();
    }
waypoint selected in context menu. This variable will be gone when the waypoint context menu is a fragment.
main/src/main/java/cgeo/geocaching/CacheDetailActivity.java