Expanded class hierarchy of TestExtension in Drupal 8
- class \Drupal\Core\Extension\ExtensionList
- class \Drupal\Core\Extension\ModuleExtensionList uses StringTranslationTrait
- class \Drupal\Core\Extension\ProfileExtensionList
- class \Drupal\Core\Extension\ThemeEngineExtensionList
- class \Drupal\Core\Extension\ThemeExtensionList
- class \Drupal\Tests\Core\Extension\TestExtension