code: @Override
      public BufferedImage getBackground(int width, int height) {
          BufferedImage bg = new BufferedImage(width, height, BufferedImage.TRANSLUCENT);
          Graphics2D g = bg.createGraphics();
  
          g.setComposite(AlphaComposite.getInstance(AlphaComposite.CLEAR, 0.0f));
          g.fillRect(0, 0, width, height);
  
          return bg;
      }
docs: {@inheritDoc}