public static void printCapitalizedPermissionNamesOfUsersWithSurnameStartingWithS(List<User> users) {
		users.stream()
				.filter(user -> user.getPersonDetails().getSurname().startsWith("S"))
				.flatMap(user -> user.getPersonDetails().getRole().getPermissions().stream())
				.map(permission -> permission.getName().toUpperCase())
				.forEach(System.out::println);
	}