10 files declare their use of RefinableCacheableDependencyInterface in Zircon Profile 8

AccessResult.php in core/lib/Drupal/Core/Access/AccessResult.php

Contains \Drupal\Core\Access\AccessResult.

Breadcrumb.php in core/lib/Drupal/Core/Breadcrumb/Breadcrumb.php

Contains \Drupal\Core\Breadcrumb\Breadcrumb.

ConfigBase.php in core/lib/Drupal/Core/Config/ConfigBase.php

Contains \Drupal\Core\Config\ConfigBase.

EntityInterface.php in core/lib/Drupal/Core/Entity/EntityInterface.php

Contains \Drupal\Core\Entity\EntityInterface.

LocalTaskManager.php in core/lib/Drupal/Core/Menu/LocalTaskManager.php

Contains \Drupal\Core\Menu\LocalTaskManager.

LocalTaskManagerInterface.php in core/lib/Drupal/Core/Menu/LocalTaskManagerInterface.php

Contains \Drupal\Core\Menu\LocalTaskManagerInterface.

menu_test.module in core/modules/system/tests/modules/menu_test/menu_test.module

Module that implements various hooks for menu tests.

PageDisplayVariantSelectionEvent.php in core/lib/Drupal/Core/Render/PageDisplayVariantSelectionEvent.php

Contains \Drupal\Core\Render\PageDisplayVariantSelectionEvent.

SearchPluginBase.php in core/modules/search/src/Plugin/SearchPluginBase.php

Contains \Drupal\search\Plugin\SearchPluginBase.

VariantInterface.php in core/lib/Drupal/Core/Display/VariantInterface.php

Contains \Drupal\Core\Display\VariantInterface.