code: public static void write(Image image, String format, OutputStream out) throws SlickException {
  		write(image, format, out, DEFAULT_ALPHA_WRITE);
  	}
docs: Write an image out to a specified output stream
  
  @param image The image to write out to
  @param format The format to write the image out in
  @param out The output stream to which the image should be written
  @throws SlickException Indicates a failure to write the image in the specified format