code: public long tileFeatureCount(Point point, int zoom) {
          TileGrid tileGrid = TileBoundingBoxUtils.getTileGridFromWGS84(point, zoom);
          return featureTiles.queryIndexedFeaturesCount((int) tileGrid.getMinX(), (int) tileGrid.getMinY(), zoom);
      }
docs: Get the count of features in the tile at the point coordinate and zoom level
  
  @param point point location
  @param zoom  zoom level
  @return count