docs: @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
      public static void detach(Activity activity, ViewTreeObserver.OnGlobalLayoutListener l) {
          ViewGroup contentView = activity.findViewById(android.R.id.content);
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
              contentView.getViewTreeObserver().removeOnGlobalLayoutListener(l);
          } else {
              //noinspection deprecation
              contentView.getViewTreeObserver().removeGlobalOnLayoutListener(l);
          }
      }