docs: public static Tile getUpperLeft(BoundingBox boundingBox, byte zoomLevel, int tileSize) {
          int tileLeft = MercatorProjection.longitudeToTileX(boundingBox.minLongitude, zoomLevel);
          int tileTop = MercatorProjection.latitudeToTileY(boundingBox.maxLatitude, zoomLevel);
          return new Tile(tileLeft, tileTop, zoomLevel, tileSize);
      }