namespace Drupal\system\Plugin\Block

Classsort descending Location Description
SystemHelpBlock drupal/core/modules/system/lib/Drupal/system/Plugin/Block/SystemHelpBlock.php Provides a 'System Help' block.
SystemMainBlock drupal/core/modules/system/lib/Drupal/system/Plugin/Block/SystemMainBlock.php Provides a 'Main page content' block.
SystemMenuBlock drupal/core/modules/system/lib/Drupal/system/Plugin/Block/SystemMenuBlock.php Provides a 'System Menu' block.
SystemPoweredByBlock drupal/core/modules/system/lib/Drupal/system/Plugin/Block/SystemPoweredByBlock.php Provides a 'Powered by Drupal' block.