mgIcon = new ImageIcon(classLoader.getResource("edu/umd/cs/findbugs/gui/mg-3.png"));
        public MyCellRenderer() {            ClassLoader classLoader = this.getClass().getClassLoader();            rootIcon = new ImageIcon(classLoader.getResource("edu/umd/cs/findbugs/gui/bug2.png"));            projectIcon = new ImageIcon(classLoader.getResource("edu/umd/cs/findbugs/gui/gear.png"));        }