docs: private static void attachToContent(Activity activity, MenuDrawer menuDrawer) {
          /**
           * Do not call mActivity#setContentView.
           * E.g. if using with a ListActivity, Activity#setContentView is overridden and dispatched to
           * MenuDrawer#setContentView, which then again would call Activity#setContentView.
           */
          ViewGroup content = (ViewGroup) activity.findViewById(android.R.id.content);
          content.removeAllViews();
          content.addView(menuDrawer, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
      }