String fullName = epsilon.util.StringUtils.join("John", "Doe"); List<Integer> numbers = Arrays.asList(5, 3, 9, 1, 2); epsilon.util.CollectionUtils.sort(numbers); Date currentDate = epsilon.util.DateTimeUtils.getCurrentDate(); String content = epsilon.util.FileUtils.readFileToString("path/to/file.txt"); HttpResponse response = epsilon.network.HttpUtils.sendGetRequest("https://api.example.com/user/123");