code: public static Drawable retrieveThemeOverviewDrawable(Context context) {
      TypedValue destinationMarkerResId = resolveAttributeFromId(context, R.attr.navigationViewRouteOverviewDrawable);
      int overviewResId = destinationMarkerResId.resourceId;
      return AppCompatResources.getDrawable(context, overviewResId);
    }
docs: Returns a route overview {@link Drawable} based on the current theme setting.
  
  @param context to retrieve overview {@link Drawable}
  @return {@link Drawable} for route overview - dark or light