The block manager. Type:

Provides a repository for Block config entities. Hierarchy class \Drupal\block\

public BlockInterface::setVisibilityConfig($instance_id, array $

public Block::getVisibility() Returns

public BlockViewBuilder::viewMultiple(array $entities = array()

protected BlockForm::validateVisibility(array $form, FormStateInterface $f

Controller for building the block instance add form. Hierarchy class \Drupal\Core\Controller\

The block storage. Type:

public Block::setVisibilityConfig($instance_id, array $configuration)

Denotes that a block is not enabled in any region and should not be shown. File core/modules/block/src/BlockInterface