Constructs a \Drupal\Component\Plugin\Discovery\StaticDiscoveryDecorator object.
\Drupal\Component\Plugin\Discovery\DiscoveryInterface $decorated: The discovery object that is being decorated.
\Callable $registerDefinitions: (optional) A callback or closure used for registering additional definitions.
public function __construct(DiscoveryInterface $decorated, $registerDefinitions = NULL) {
$this->decorated = $decorated;
$this->registerDefinitions = $registerDefinitions;
}