13 files declare their use of ContextException in Drupal 10

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

Contains \Drupal\Tests\Core\Condition\ConditionAccessResolverTraitTest.

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

Contains \Drupal\Tests\Core\Plugin\ContextHandlerTest.

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