30 files declare their use of AccountInterface

AccessibleInterface.php in drupal/core/lib/Drupal/Core/TypedData/AccessibleInterface.php
Contains \Drupal\Core\TypedData\AccessibleInterface.
AccessPluginBase.php in drupal/core/modules/views/lib/Drupal/views/Plugin/views/access/AccessPluginBase.php
Definition of Drupal\views\Plugin\views\access\AccessPluginBase.
BlockAccessController.php in drupal/core/modules/block/lib/Drupal/block/BlockAccessController.php
Contains \Drupal\block\BlockAccessController.
CategoryAccessController.php in drupal/core/modules/contact/lib/Drupal/contact/CategoryAccessController.php
Contains \Drupal\contact\CategoryAccessController.
CommentAccessController.php in drupal/core/modules/comment/lib/Drupal/comment/CommentAccessController.php
Contains \Drupal\comment\CommentAccessController
CustomBlockAccessController.php in drupal/core/modules/block/custom_block/lib/Drupal/custom_block/CustomBlockAccessController.php
Contains \Drupal\custom_block\CustomBlockAccessController.
Entity.php in drupal/core/lib/Drupal/Core/Entity/Entity.php
Contains \Drupal\Core\Entity\Entity.
EntityAccessController.php in drupal/core/lib/Drupal/Core/Entity/EntityAccessController.php
Contains \Drupal\Core\Entity\EntityAccessController.
EntityAccessControllerInterface.php in drupal/core/lib/Drupal/Core/Entity/EntityAccessControllerInterface.php
Contains \Drupal\Core\Entity\EntityAccessControllerInterface.
EntityAccessTest.php in drupal/core/modules/system/lib/Drupal/system/Tests/Entity/EntityAccessTest.php
Contains Drupal\system\Tests\Entity\EntityAccessTest.
EntityBCDecorator.php in drupal/core/lib/Drupal/Core/Entity/EntityBCDecorator.php
Contains \Drupal\Core\Entity\EntityBCDecorator.
EntityTestAccessController.php in drupal/core/modules/system/tests/modules/entity_test/lib/Drupal/entity_test/EntityTestAccessController.php
Contains Drupal\entity_test\EntityTestAccessController.
EntityTranslation.php in drupal/core/lib/Drupal/Core/Entity/Field/Type/EntityTranslation.php
Contains \Drupal\Core\Entity\Type\EntityTranslation.
Field.php in drupal/core/lib/Drupal/Core/Entity/Field/Type/Field.php
Contains \Drupal\Core\Entity\Field\Type\Field.
NodeAccessController.php in drupal/core/modules/node/lib/Drupal/node/NodeAccessController.php
Contains \Drupal\node\NodeAccessController.
NodeTestBase.php in drupal/core/modules/node/lib/Drupal/node/Tests/NodeTestBase.php
Definition of Drupal\node\Tests\NodeTestBase.
None.php in drupal/core/modules/views/lib/Drupal/views/Plugin/views/access/None.php
Definition of Drupal\views\Plugin\views\access\None.
overlay.module in drupal/core/modules/overlay/overlay.module
Displays the Drupal administration interface in an overlay.
Permission.php in drupal/core/modules/user/lib/Drupal/user/Plugin/views/access/Permission.php
Definition of Drupal\user\Plugin\views\access\Permission.
Role.php in drupal/core/modules/user/lib/Drupal/user/Plugin/views/access/Role.php
Definition of Drupal\user\Plugin\views\access\Role.
RoleAccessController.php in drupal/core/modules/user/lib/Drupal/user/RoleAccessController.php
Contains \Drupal\user\RoleAccessController.
ShortcutAccessController.php in drupal/core/modules/shortcut/lib/Drupal/shortcut/ShortcutAccessController.php
Contains \Drupal\shortcut\ShortcutAccessController.
StaticTest.php in drupal/core/modules/views/tests/views_test_data/lib/Drupal/views_test_data/Plugin/views/access/StaticTest.php
Definition of Drupal\views_test_data\Plugin\views\access\StaticTest.
TermAccessController.php in drupal/core/modules/taxonomy/lib/Drupal/taxonomy/TermAccessController.php
Contains \Drupal\taxonomy\TermAccessController.
translation_entity.module in drupal/core/modules/translation_entity/translation_entity.module
Allows entities to be translated into different languages.
user.module in drupal/core/modules/user/user.module
Enables the user registration and login system.
UserAccessController.php in drupal/core/modules/user/lib/Drupal/user/UserAccessController.php
Contains \Drupal\user\UserAccessController.
UserInterface.php in drupal/core/modules/user/lib/Drupal/user/UserInterface.php
Contains \Drupal\user\UserInterface.
ViewUI.php in drupal/core/modules/views_ui/lib/Drupal/views_ui/ViewUI.php
Definition of Drupal\views_ui\ViewUI.
VocabularyAccessController.php in drupal/core/modules/taxonomy/lib/Drupal/taxonomy/VocabularyAccessController.php
Contains \Drupal\taxonomy\VocabularyAccessController.