docs: private void reloadMarker() {
          // initialized
          if (mCurrentBackgroundMarkerLoaderTask == null) {
              // start background load
              double zoom = this.mMapView.getZoomLevelDouble();
              BoundingBox world = this.mMapView.getBoundingBox();
  
              reloadMarker(world, zoom);
          } else {
              // background load is already active. Remember that at least one scroll/zoom was missing
  			mMissedMapZoomScrollUpdates++;
  		}
      }