private static void drawHorizontalGripper(Graphics gc, DockLayoutNode secondary) {
		int x = secondary.getX() - DIVIDER_SIZE + (DIVIDER_SIZE - GRIP_WIDTH) / 2;
		int y = secondary.getY() + (secondary.getHeight() - GRIP_LENGTH) / 2;
		int top = GRIP_HEIGHT / 2;
		int bottom = GRIP_HEIGHT - top;
		for (int yy = y; yy < y + GRIP_LENGTH; yy += GRIP_HEIGHT + GRIP_GAP) {
			gc.setColor(DockColors.HIGHLIGHT);
			gc.fillRect(x, yy, GRIP_WIDTH, top);
			gc.setColor(DockColors.SHADOW);
			gc.fillRect(x, yy + top, GRIP_WIDTH, bottom);
		}
	}