docs: public void redraw() {
          Layers mapOverlays = clusterManager.getMapView().getLayerManager().getLayers();
          if (clusterMarker != null && !clusterManager.getCurBounds().contains(center)
                  && mapOverlays.contains(clusterMarker)) {
              mapOverlays.remove(clusterMarker);
              return;
          }
          if (clusterMarker != null
                  && mapOverlays.size() > 0
                  && !mapOverlays.contains(clusterMarker)
                  && !clusterManager.isClustering) {
              mapOverlays.add(1, clusterMarker);
          }
      }