13 files declare their use of ContextException

BlockAccessControlHandler.php in core/modules/block/src/BlockAccessControlHandler.php
ConditionAccessResolverTrait.php in core/lib/Drupal/Core/Condition/ConditionAccessResolverTrait.php
ConditionAccessResolverTraitTest.php in core/tests/Drupal/Tests/Core/Condition/ConditionAccessResolverTraitTest.php
Context.php in core/lib/Drupal/Core/Plugin/Context/Context.php
Context.php in core/lib/Drupal/Component/Plugin/Context/Context.php
ContextAwarePluginDefinitionTrait.php in core/lib/Drupal/Component/Plugin/Definition/ContextAwarePluginDefinitionTrait.php
ContextAwarePluginTrait.php in core/lib/Drupal/Core/Plugin/ContextAwarePluginTrait.php
ContextAwarePluginTraitTest.php in core/tests/Drupal/KernelTests/Core/Plugin/Context/ContextAwarePluginTraitTest.php
ContextHandler.php in core/lib/Drupal/Core/Plugin/Context/ContextHandler.php
ContextHandlerTest.php in core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php
ContextPluginTest.php in core/tests/Drupal/KernelTests/Core/Plugin/ContextPluginTest.php
SectionStorageManager.php in core/modules/layout_builder/src/SectionStorage/SectionStorageManager.php
SectionStorageManagerTest.php in core/modules/layout_builder/tests/src/Unit/SectionStorageManagerTest.php

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