private static boolean exists(String name, String theme) {
		if (!cache.containsKey(theme)) {
			List<String> nameList = new ArrayList<String>();
			nameList.add(name);
			cache.easyPut(theme, nameList);
			return false;
		} else {
			List<String> nameListAlreayInTheme = cache.get(theme);
			if (nameListAlreayInTheme.contains(name)) {
				return true;
			} else {
				nameListAlreayInTheme.add(name);
				return false;
			}
		}
	}