18 files declare their use of CacheBackendInterface

AliasManagerCacheDecorator.php in drupal/core/lib/Drupal/Core/CacheDecorator/AliasManagerCacheDecorator.php
Contains Drupal\Core\CacheDecorator\AliasManagerCacheDecorator.
BackendChainImplementationUnitTest.php in drupal/core/modules/system/lib/Drupal/system/Tests/Cache/BackendChainImplementationUnitTest.php
Definition of Drupal\system\Tests\Cache\BackendChainImplementationUnitTest.
CacheArray.php in drupal/core/lib/Drupal/Core/Utility/CacheArray.php
Definition of CacheArray
CachedStorage.php in drupal/core/lib/Drupal/Core/Config/CachedStorage.php
Contains Drupal\Core\Config\CachedStorage.
CachePluginBase.php in drupal/core/modules/views/lib/Drupal/views/Plugin/views/cache/CachePluginBase.php
Definition of Drupal\views\Plugin\views\cache\CachePluginBase.
common.inc in drupal/core/includes/common.inc
Common functions that many Drupal modules will need to reference.
entity.inc in drupal/core/includes/entity.inc
Entity API for handling entities like nodes or users.
EntityManager.php in drupal/core/lib/Drupal/Core/Entity/EntityManager.php
Contains \Drupal\Core\Entity\EntityManager.
field.info.inc in drupal/core/modules/field/field.info.inc
Field Info API, providing information about available fields and field types.
FieldInfo.php in drupal/core/modules/field/lib/Drupal/field/FieldInfo.php
filter.module in drupal/core/modules/filter/filter.module
Framework for handling the filtering of content.
GenericCacheBackendUnitTestBase.php in drupal/core/modules/system/lib/Drupal/system/Tests/Cache/GenericCacheBackendUnitTestBase.php
Definition of Drupal\system\Tests\Cache\GenericCacheBackendUnitTestBase.
menu.inc in drupal/core/includes/menu.inc
API for the Drupal menu system.
node.module in drupal/core/modules/node/node.module
The core module that allows content to be submitted to the site.
schema.inc in drupal/core/includes/schema.inc
Schema API handling functions.
theme.inc in drupal/core/includes/theme.inc
The theme system, which controls the output of Drupal.
ThemeRegistry.php in drupal/core/lib/Drupal/Core/Utility/ThemeRegistry.php
Definition of Drupal\Core\Utility\ThemeRegistry
Time.php in drupal/core/modules/views/lib/Drupal/views/Plugin/views/cache/Time.php
Definition of Drupal\views\Plugin\views\cache\Time.