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.e2e.util; /** * Handles running and retrying of {@link Retryable} tasks. * Generally, the methods retry tasks with exponential backoff until one of the following conditions is met: * <ul> * <li>Task is successful (see specific method documentation for definition of success).</li> * <li>Maximum retries are exceeded (as determined by the specified maximum delay).</li> * <li>A {@link Throwable} of type specified in the task is encountered (this is thrown upwards).</li> * </ul> */ public final class RetryManager { private final int maxDelayInS; /** * Creates a new {@link RetryManager} that contains methods to retry tasks. * * @param maxDelayInS maximum delay (in seconds) to wait before final retry. */ public RetryManager(int maxDelayInS) { this.maxDelayInS = maxDelayInS; } /** * Runs {@code task}, retrying if needed using exponential backoff, until no exceptions of the specified * {@code recognizedExceptionTypes} are caught. * * @throws MaximumRetriesExceededException if maximum retries are exceeded. */ @SafeVarargs @SuppressWarnings("PMD.AvoidCatchingThrowable") // allow users to catch specific errors e.g. AssertionError public final void runUntilNoRecognizedException( Retryable task, Class<? extends Throwable>... recognizedExceptionTypes) throws MaximumRetriesExceededException { for (int delay = 1; delay <= maxDelayInS; delay *= 2) { try { task.run(); return; } catch (Throwable e) { if (!isThrowableTypeIn(e, recognizedExceptionTypes)) { throw e; } // continue retry process } logFailure(task, delay); ThreadHelper.waitFor(delay * 1000); } try { task.run(); } catch (Throwable e) { if (!isThrowableTypeIn(e, recognizedExceptionTypes)) { throw e; } throw new MaximumRetriesExceededException(task, e); } } @SafeVarargs private static boolean isThrowableTypeIn(Throwable e, Class<? extends Throwable>... recognizedExceptionTypes) { for (Class<? extends Throwable> recognizedExceptionType : recognizedExceptionTypes) { if (recognizedExceptionType.isInstance(e)) { return true; } } return false; } private static void logFailure(Retryable task, int delay) { System.out.println(task.getName() + " failed; waiting " + delay + "s before retry"); } }
    
Assistant: