public ExtensionDiscovery::__construct($root, $use_file_cache

hook_requirements($phase) Check installation requirements and do status reporting. This

protected ExtensionDiscovery::scanDirectory($dir, $inclu

public ThemeHandler::uninstall(array $theme_list)

hook_post_update_NAME(&$sandbox) Executes an update which is intended to update data, like entities.

Type:

List of base extension type directory names to scan. Only these directory names are considered when starting a filesystem recursion in a search

public ModuleHandlerInterface::alter($type, &$data

hook_module_implements_alter(&$implementations, $hook) Alter the registry of modules implementing a hook

Type: \Psr\Log\LoggerInterface File core/lib/Drupal/Core/Extension/ThemeInstaller.php