code: public Tile getTile (int tileSetId, int tileIndex, TileSet.Colorizer rizer)
          throws NoSuchTileSetException
      {
          TileSet set = getTileSet(tileSetId);
          return set.getTile(tileIndex, rizer);
      }
docs: Returns the {@link Tile} object from the specified tileset at the specified index.
  
  @param tileSetId the tileset id.
  @param tileIndex the index of the tile to be retrieved.
  
  @return the tile object.