9 files declare their use of ContextInterface

BlockComponentRenderArrayTest.php in core/modules/layout_builder/tests/src/Unit/BlockComponentRenderArrayTest.php
ConditionPluginCollection.php in core/lib/Drupal/Core/Condition/ConditionPluginCollection.php
ContextAwarePluginBase.php in core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php
ContextAwarePluginBase.php in core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php
ContextAwarePluginBaseTest.php in core/tests/Drupal/KernelTests/Core/Plugin/Context/ContextAwarePluginBaseTest.php
ContextAwarePluginInterface.php in core/lib/Drupal/Component/Plugin/ContextAwarePluginInterface.php
ContextInterface.php in core/lib/Drupal/Core/Plugin/Context/ContextInterface.php
DefaultsSectionStorage.php in core/modules/layout_builder/src/Plugin/SectionStorage/DefaultsSectionStorage.php
SectionStorageManagerTest.php in core/modules/layout_builder/tests/src/Unit/SectionStorageManagerTest.php

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