@Override
	public void paintIcon(Component c, Graphics g, int x, int y) {
		g.setColor(VERSION_ICON_COLOR);
		g.fillRect(x + 1, y + 1, WIDTH - 2, HEIGHT - 2);
		g.drawLine(x + 1, y, x + WIDTH - 2, y);
		g.drawLine(x + WIDTH - 1, y + 1, x + WIDTH - 1, y + HEIGHT - 2);
		g.drawLine(x + 1, y + HEIGHT - 1, x + WIDTH - 2, y + HEIGHT - 1);
		g.drawLine(x, y + 1, x, y + HEIGHT - 2);
	}
{@link VersionIcon} is the base icon for files which exist within the versioned filesystem.
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/GhidraFileData.java