PreviewFallbackInterface

class \Drupal\Core\Block\BlockBase implements \Drupal\Core\Block\BlockPluginInterface, \Drupal\Core\Plugin\PluginWithFormsInterface, \Drupal\Core\Plugin\PreviewAwarePluginInterface, \Drupal\Core\Render\PreviewFallbackInterface, \Drupal\Core\Plugin\ContextAwarePluginInterface uses \Drupal\Core\Block\BlockPluginTrait, \Drupal\Core\Plugin\ContextAwarePluginTrait, \Drupal\Core\Plugin\ContextAwarePluginAssignmentTrait extends \Drupal\Core\Plugin\PluginBase
class \Drupal\Core\Block\Plugin\Block\PageTitleBlock implements \Drupal\Core\Block\TitleBlockPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\Core\Menu\Plugin\Block\LocalActionsBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\Core\Menu\Plugin\Block\LocalTasksBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\ajax_forms_test\Plugin\Block\AjaxFormBlock implements \Drupal\Core\Form\FormInterface, \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\announcements_feed\Plugin\Block\AnnounceBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\block_content\Plugin\Block\BlockContentBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\block_example\Plugin\Block\ExampleConfigurableTextBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_example\Plugin\Block\ExampleEmptyBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_example\Plugin\Block\ExampleUppercaseBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestAccessBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestBlockInstantiation extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestCacheBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestContextAwareBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestContextAwareNoValidContextOptionsBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestContextAwareUnsatisfiedBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestFormBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestHtmlBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestMultipleFormsBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestSettingsValidationBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\block_test\Plugin\Block\TestXSSTitleBlock extends \Drupal\block_test\Plugin\Block\TestCacheBlock
class \Drupal\book\Plugin\Block\BookNavigationBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\ctools\Plugin\Block\EntityView implements \Drupal\Core\Plugin\ContextAwarePluginInterface, \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\ctools_block\Plugin\Block\EntityField implements \Drupal\Core\Plugin\ContextAwarePluginInterface, \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\devel\Plugin\Block\SwitchUserBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\form_api_example\Plugin\Block\SimpleFormBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\form_test\Plugin\Block\RedirectFormBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\forum\Plugin\Block\ActiveTopicsBlock extends \Drupal\forum\Plugin\Block\ForumBlockBase
class \Drupal\forum\Plugin\Block\ForumBlockBase extends \Drupal\Core\Block\BlockBase
class \Drupal\forum\Plugin\Block\NewTopicsBlock extends \Drupal\forum\Plugin\Block\ForumBlockBase
class \Drupal\help\Plugin\Block\HelpBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\render_attached_test\Plugin\Block\AttachedRenderingBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\statistics\Plugin\Block\StatisticsPopularBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\system\Plugin\Block\SystemBrandingBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\system\Plugin\Block\SystemBreadcrumbBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\system\Plugin\Block\SystemMainBlock implements \Drupal\Core\Block\MainContentBlockPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\system\Plugin\Block\SystemMenuBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\system\Plugin\Block\SystemMessagesBlock implements \Drupal\Core\Block\MessagesBlockPluginInterface extends \Drupal\Core\Block\BlockBase
class \Drupal\system\Plugin\Block\SystemPoweredByBlock extends \Drupal\Core\Block\BlockBase
class \Drupal\user\Plugin\Block\UserLoginBlock implements \Drupal\Core\Plugin\ContainerFactoryPluginInterface, \Drupal\Core\Security\TrustedCallbackInterface uses \Drupal\Core\Routing\RedirectDestinationTrait extends \Drupal\Core\Block\BlockBase

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