docs: public boolean isWaterTile(TileCoordinate tc) {
          List<TileCoordinate> tiles = tc.translateToZoomLevel(TILE_INFO_ZOOMLEVEL);
          for (TileCoordinate tile : tiles) {
              if (!this.seaTileInfo.get(tile.getY() * 4096 + tile.getX())) {
                  return false;
              }
          }
          return true;
      }