16 files declare their use of JsonResponse

admin.inc in drupal/core/modules/views/views_ui/admin.inc
Provides the Views' administrative interface.
ajax.inc in drupal/core/modules/views/includes/ajax.inc
Handles the server side AJAX interactions of Views.
AjaxResponse.php in drupal/core/lib/Drupal/Core/Ajax/AjaxResponse.php
Definition of Drupal\Core\Ajax\AjaxResponse.
batch.inc in drupal/core/includes/batch.inc
Batch processing API for processes to run in multiple HTTP requests.
database_test.module in drupal/core/modules/system/tests/modules/database_test/database_test.module
ExceptionController.php in drupal/core/lib/Drupal/Core/ExceptionController.php
Definition of Drupal\Core\ExceptionController.
file.module in drupal/core/modules/file/file.module
Defines a "managed_file" Form API field and a "file" field for Field module.
JsonResponseTest.php in drupal/core/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
menu.module in drupal/core/modules/menu/menu.module
Allows administrators to customize the site's navigation menus.
system.admin.inc in drupal/core/modules/system/system.admin.inc
Admin page callbacks for the system module.
system.module in drupal/core/modules/system/system.module
Configuration system that lets administrators modify the workings of the site.
taxonomy.pages.inc in drupal/core/modules/taxonomy/taxonomy.pages.inc
Page callbacks for the taxonomy module.
toolbar.module in drupal/core/modules/toolbar/toolbar.module
Administration toolbar for quick access to top level administration items.
user.pages.inc in drupal/core/modules/user/user.pages.inc
User page callback file for the user module.
ViewSubscriber.php in drupal/core/lib/Drupal/Core/EventSubscriber/ViewSubscriber.php
Definition of Drupal\Core\EventSubscriber\ViewSubscriber.
views_ui.module in drupal/core/modules/views/views_ui/views_ui.module
Provide structure for the administrative interface to Views.