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Introduction to namespaces

PHP classes, interfaces, and traits in Drupal are namespaced. See the Objected-oriented programming conventions for more information.

See also

Objected-oriented programming conventions

Namespace
Drupal\block_content\Form
Drupal\block_content\Plugin\Derivative
Drupal\block_content\Plugin\migrate\source\d6
Drupal\block_content\Plugin\migrate\source\d7
Drupal\block_content\Plugin\Validation\Constraint
Drupal\block_content\Plugin\views\area
Drupal\block_content\Routing
Drupal\block_content_test\Plugin\EntityReferenceSelection
Drupal\block_test
Drupal\block_test\ContextProvider
Drupal\block_test\Controller
Drupal\block_test\Form
Drupal\block_test\PluginForm
Drupal\block_test\Plugin\Block
Drupal\book
Drupal\book\Access
Drupal\book\Controller
Drupal\book\Form
Drupal\book\Plugin\migrate\destination
Drupal\book\Plugin\migrate\source
Drupal\book\Plugin\Validation\Constraint
Drupal\book\ProxyClass
Drupal\breakpoint
Drupal\BuildTests\Composer
Drupal\BuildTests\Composer\Component
Drupal\BuildTests\Framework
Drupal\BuildTests\Framework\Tests
Drupal\BuildTests\QuickStart
Drupal\BuildTests\TestSiteApplication
Drupal\cache_test\Controller
Drupal\ckeditor5
Drupal\ckeditor5\Annotation
Drupal\ckeditor5\Controller
Drupal\ckeditor5\EventSubscriber
Drupal\ckeditor5\Plugin
Drupal\ckeditor5\Plugin\CKEditor4To5Upgrade
Drupal\ckeditor5\Plugin\CKEditor5Plugin
Drupal\ckeditor5\Plugin\Validation\Constraint
Drupal\ckeditor5_plugin_elements_subset\Plugin\CKEditor5Plugin
Drupal\ckeditor5_test\Controller
Drupal\claro
Drupal\comment
Drupal\comment\Controller
Drupal\comment\Entity
Drupal\comment\Form
Drupal\comment\Plugin\Action
Drupal\comment\Plugin\Field\FieldType
Drupal\comment\Plugin\Menu\LocalTask
Drupal\comment\Plugin\migrate
Drupal\comment\Plugin\migrate\destination

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