16 files declare their use of PluginException

aggregator.module in drupal/core/modules/aggregator/aggregator.module
Used to aggregate syndicated content (RSS, RDF, and Atom).
block.module in drupal/core/modules/block/block.module
Controls the visual building blocks a page is constructed with.
BlockPluginBag.php in drupal/core/modules/block/lib/Drupal/block/BlockPluginBag.php
Contains \Drupal\block\BlockPluginBag.
BlockStorageUnitTest.php in drupal/core/modules/block/lib/Drupal/block/Tests/BlockStorageUnitTest.php
Contains \Drupal\block\Tests\BlockStorageUnitTest.
ContextAwarePluginBase.php in drupal/core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php
Contains \Drupal\Component\Plugin\ContextAwarePluginBase
ContextAwarePluginBase.php in drupal/core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php
Contains \Drupal\Core\Plugin\ContextAwarePluginBase
ContextAwarePluginInterface.php in drupal/core/lib/Drupal/Component/Plugin/ContextAwarePluginInterface.php
Contains \Drupal\Component\Plugin\ContextAwarePluginInterface.
ContextPluginTest.php in drupal/core/modules/system/lib/Drupal/system/Tests/Plugin/ContextPluginTest.php
Contains \Drupal\system\Tests\Plugin\ContextPluginTest.
DefaultFactory.php in drupal/core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php
Definition of Drupal\Component\Plugin\Factory\DefaultFactory.
DisplayBag.php in drupal/core/modules/views/lib/Drupal/views/DisplayBag.php
Contains \Drupal\views\DisplayBag.
ExecutablePluginBase.php in drupal/core/lib/Drupal/Core/Executable/ExecutablePluginBase.php
Contains \Drupal\Core\Executable\ExecutablePluginBase.
FilterBag.php in drupal/core/modules/filter/lib/Drupal/filter/FilterBag.php
Contains \Drupal\filter\FilterBag.
SelectionPluginManager.php in drupal/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Type/SelectionPluginManager.php
Contains \Drupal\entity_reference\Plugin\Type\SelectionPluginManager.
TipsBag.php in drupal/core/modules/tour/lib/Drupal/tour/TipsBag.php
Contains \Drupal\tour\TipsBag.
TypedDataFactory.php in drupal/core/lib/Drupal/Core/TypedData/TypedDataFactory.php
Contains \Drupal\Core\TypedData\TypedDataFactory.
views.module in drupal/core/modules/views/views.module
Primarily Drupal hooks and global API functions to manipulate views.