code: private static void addBoxesWithDiffContent(final WPanel panel, final int amount) {
  		for (int i = 1; i <= amount; i++) {
  			WPanel content = new WPanel(WPanel.Type.BOX);
  			content.setLayout(new FlowLayout(FlowLayout.VERTICAL, 3));
  			for (int j = 1; j <= i; j++) {
  				content.add(new WText(Integer.toString(i)));
  			}
  			panel.add(content);
  		}
  	}
docs: Adds a set of boxes to the given panel.
  
  @param panel the panel to add the boxes to.
  @param amount the number of boxes to add.