public BufferedImage(ColorModel colormodel, WritableRaster writableraster, boolean premultiplied, Hashtable properties)
public BufferedImage(int w, int h, int type)
  public BufferedImage(ColorModel colormodel, 		       WritableRaster writableraster,		       boolean premultiplied,		       Hashtable properties)  {    init(colormodel, writableraster, premultiplied, properties,	 TYPE_CUSTOM);		// TODO: perhaps try to identify type?	}