docs: public static Bitmap retrieveThemeMapMarker(Context context) {
      TypedValue destinationMarkerResId = resolveAttributeFromId(context, R.attr.navigationViewDestinationMarker);
      int markerResId = destinationMarkerResId.resourceId;
      Drawable markerDrawable = ContextCompat.getDrawable(context, markerResId);
      return BitmapUtils.getBitmapFromDrawable(markerDrawable);
    }