hook_block_view_BASE_BLOCK_ID_alter(array &$build, \Drupal\Core\Block\BlockPluginInterface $block) Provide

protected BlockLibraryController::bui

public static BlockAccessControlHandler::c

The available contexts for this block and its visibility conditions. Type:

Indicates the block label (title) should be displayed to end users. File core/modules/block/src/BlockInterface

The condition plugin manager. Type:

public BlockAccessControlHandler::__constr

public static BlockViewBuilder::preRender($build)

Defines a base block implementation that most blocks plugins will extend. This abstract class provides the generic block configuration form

public Block::getVisibilityCondition($instance_id)