code: @Override
      public Tile getTile(int x, int y, int zoom) {
  
          Tile tile = null;
  
          // Check if there is a tile
          if (hasTile(x, y, zoom)) {
  
              // Retrieve the tile
              tile = retrieveTile(x, y, zoom);
          }
  
          return tile;
      }
docs: {@inheritDoc}