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.logic.core; /** * Handles the logic related to deadline extensions. */ public final class DeadlineExtensionsLogic { private static final DeadlineExtensionsLogic instance = new DeadlineExtensionsLogic(); private final DeadlineExtensionsDb deDb = DeadlineExtensionsDb.inst(); private DeadlineExtensionsLogic() { // prevent initialization } public static DeadlineExtensionsLogic inst() { return instance; } /** * Updates a deadline extension. * * <p>If {@code endTimeOption} is present and {@code sentClosingEmailOption} * is not explicitly set, update {@code sentClosingEmailOption} to false. * * @return the updated deadline extension * @throws InvalidParametersException if the updated deadline extension is not valid * @throws EntityDoesNotExistException if the deadline extension to update does not exist */ public DeadlineExtensionAttributes updateDeadlineExtension(DeadlineExtensionAttributes.UpdateOptions updateOptions) throws InvalidParametersException, EntityDoesNotExistException { // reset sentClosingEmail if the session deadline is updated and sentClosingEmailOption is not explicitly set if (updateOptions.isEndTimeOptionPresent() && !updateOptions.isSentClosingEmailOptionPresent()) { return deDb.updateDeadlineExtension(DeadlineExtensionAttributes.updateOptionsBuilder(updateOptions) .withSentClosingEmail(false) .build()); } return deDb.updateDeadlineExtension(updateOptions); } /** * Updates all deadline extensions of a user in a course with new email. */ public void updateDeadlineExtensionsWithNewEmail(String courseId, String oldEmail, String newEmail, boolean isInstructor) throws InvalidParametersException { deDb.updateDeadlineExtensionsWithNewEmail(courseId, oldEmail, newEmail, isInstructor); } /** * Creates a deadline extension. * * @return the created deadline extension * @throws InvalidParametersException if the deadline extension is not valid * @throws EntityAlreadyExistsException if the deadline extension to create already exists */ public DeadlineExtensionAttributes createDeadlineExtension(DeadlineExtensionAttributes deadlineExtension) throws InvalidParametersException, EntityAlreadyExistsException { return deDb.createEntity(deadlineExtension); } /** * Deletes a deadline extension. * * <p>Fails silently if the deadline extension doesn't exist.</p> */ public void deleteDeadlineExtension( String courseId, String feedbackSessionName, String userEmail, boolean isInstructor) { deDb.deleteDeadlineExtension(courseId, feedbackSessionName, userEmail, isInstructor); } /** * Deletes all deadline extensions for a user in a course. * * <p>Fails silently if the deadline extension doesn't exist.</p> */ public void deleteDeadlineExtensions(String courseId, String userEmail, boolean isInstructor) { assert courseId != null; assert userEmail != null; AttributesDeletionQuery query = AttributesDeletionQuery.builder() .withCourseId(courseId) .withUserEmail(userE
Assistant: