code: public static Graphics getGraphicsForImage(Image image) throws SlickException {
  		Graphics g = (Graphics) graphics.get(image.getTexture());
  		
  		if (g == null) {
  			g = createGraphics(image);
  			graphics.put(image.getTexture(), g);
  		}
  		
  		return g;
  	}
docs: Get a graphics context for a particular image
  
  @param image The image for which to retrieve the graphics context
  @return The graphics context
  @throws SlickException Indicates it wasn't possible to create a graphics context
  given available hardware.