### Question:
IconUtils { public static void initFontAwesomeOffline() { FontAwesomeOffline.init(); } private  IconUtils(); static List<Image> createWindowIcons(); static Node createErrorIcon(); static void initFontAwesomeOffline(); static GlyphFont getFontAwesome();  }### Answer:
@Test public void testInitFontAwesomeOffline() { assertNull(IconUtils.getFontAwesome()); IconUtils.initFontAwesomeOffline(); GlyphFont font = IconUtils.getFontAwesome(); assertNotNull(font); GlyphFont registeredFont = GlyphFontRegistry.font("FontAwesome"); assertNotNull(registeredFont); assertEquals(font, registeredFont); }