Assistant: 
User: 
    Please analyze the following code file and determine whether it belongs to any of the provided modules based on the listed module descriptions.
    Note that the provided list of modules may not be exhaustive, and some files may not belong to any of the modules. 
    If the code belongs to a module, Only output the module name, without any explanation or additional information; otherwise, return 'None' if it does not belong to any module.

    Modules : {
        "UI": "Handles the front-end user interface, consisting of HTML, CSS, and JavaScript files generated by the Angular framework. It processes user requests and interacts with the server using AJAX for data retrieval and client-side interactions."
"Test Driver": "Facilitates automated regression testing and handles transmission of test data in JSON format. It performs Java testing using TestNG and JavaScript unit-testing with Jest. It also sets up a simulated web server for servlet-level tests and automates end-to-end testing using Selenium Java."
"Logic": "Manages the business logic of TEAMMATES, including handling relationships between entities, managing transactions, input value sanitization, access control rights, and interfacing with GAE-provided or third-party APIs."
"Storage": "Performs CRUD operations on data entities, validation of data, and abstraction of GQL queries, hiding the complexities of datastore from the Logic component."
"Common": "Contains utility classes, custom exceptions, and data transfer objects used across the entire application for easy consolidation and transfer of structured data."
"E2E": "Handles end-to-end testing and load & performance testing, providing helpers, abstractions of browser pages, and test cases for E2E tests and L&P tests."
"Client": "Contains scripts for administrative tasks, such as migrating data to a new schema and calculating statistics. This module connects directly to the application back-end for administrative purposes."
    }

    Code: package teammates.test; /** * Checks email content and accounts for unpredictable values such as encrypted values, * support email, app URL. */ public final class EmailChecker { private static final String REGEX_REGKEY = "[A-F0-9]{32,}"; private EmailChecker() { // Utility class } /** * Verifies that the given {@code emailContent} is the same as * the content given in the file at {@code fileName}. <br> */ public static void verifyEmailContent(String emailContent, String fileName) throws IOException { String filePath = TestProperties.TEST_EMAILS_FOLDER + fileName; String actual = processEmailForComparison(emailContent); try { String expected = FileHelper.readFile(filePath); expected = injectTestProperties(expected); if (!expected.equals(actual)) { assertEquals("<expected>" + System.lineSeparator() + expected + "</expected>", "<actual>" + System.lineSeparator() + actual + "</actual>"); } } catch (IOException | AssertionError e) { if (!updateSnapshot(filePath, actual)) { throw e; } } } private static boolean updateSnapshot(String filePath, String emailContent) throws IOException { return TestProperties.IS_SNAPSHOT_UPDATE && regenerateEmailFile(filePath, emailContent); } private static boolean regenerateEmailFile(String filePath, String emailContent) throws IOException { if (emailContent == null || emailContent.isEmpty()) { return false; } String processedEmailContent = processEmailForExpectedEmailRegeneration(emailContent) + System.lineSeparator(); FileHelper.saveFile(filePath, processedEmailContent); return true; } /** * Injects values specified in configuration files to the appropriate placeholders. */ private static String injectTestProperties(String emailContent) { return emailContent.replace("${app.url}", getAppUrl()) .replace("${support.email}", Config.SUPPORT_EMAIL); } private static String getAppUrl() { return Config.getFrontEndAppUrl("").toAbsoluteString(); } /** * Processes the {@code emailContent} for comparison. */ public static String processEmailForComparison(String emailContent) { return replaceUnpredictableValuesWithPlaceholders(emailContent); } /** * Substitutes values that are different across various test runs with placeholders. * These values are identified using their known, unique formats. */ private static String replaceUnpredictableValuesWithPlaceholders(String emailContent) { return emailContent // regkey in URLs .replaceAll(Const.ParamsNames.REGKEY + "=" + REGEX_REGKEY, Const.ParamsNames.REGKEY + "=\\${regkey\\.enc}"); } private static String replaceInjectedValuesWithPlaceholders(String emailContent) { return emailContent.replace(getAppUrl(), "${app.url}") .replace(Config.SUPPORT_EMAIL, "${support.email}"); } /** * Processes the {@code emailContent} string for regeneration of expected email content.<br> * Pre-condition: {@code emailContent} has previously been processed with the * {@link #processEmailForComparison} function. */ private st
Assistant: