Provides a list of block plugins to be added to the layout. Hierarchy class \Drup

Hierarchy interface \Drupal\block\

public BlockInterface::getVisibility()

Provides a Block view builder. Hierarchy class \Drupal\Core\Entity\

protected BlockListBuilder::systemRegionList($theme, $show =

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

The block manager. Type:

block_install() Implements

The theme handler. Type:

public BlockBase::__construct(array $configuration, $plugin_id, $plugin_definition)