class MigrateDestinationPluginManager

class MigrateDestinationPluginManager extends MigratePluginManager {
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs a MigrateDestinationPluginManager object.
     *
     * @param string $type
     *   The type of the plugin: row, source, process, destination, entity_field,
     *   id_map.
     * @param \Traversable $namespaces
     *   An object that implements \Traversable which contains the root paths
     *   keyed by the corresponding namespace to look for plugin implementations.
     * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
     *   Cache backend instance to use.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler to invoke the alter hook with.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param string $annotation
     *   (optional) The annotation class name. Defaults to
     *   'Drupal\migrate\Annotation\MigrateDestination'.
     */
    public function __construct($type, \Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler, EntityTypeManagerInterface $entity_type_manager, $annotation = 'Drupal\\migrate\\Annotation\\MigrateDestination') {
        parent::__construct($type, $namespaces, $cache_backend, $module_handler, $annotation);
        $this->entityTypeManager = $entity_type_manager;
    }
    
    /**
     * {@inheritdoc}
     *
     * A specific createInstance method is necessary to pass the migration on.
     */
    public function createInstance($plugin_id, array $configuration = [], MigrationInterface $migration = NULL) {
        if (substr($plugin_id, 0, 7) == 'entity:' && !$this->entityTypeManager
            ->getDefinition(substr($plugin_id, 7), FALSE)) {
            $plugin_id = 'null';
        }
        return parent::createInstance($plugin_id, $configuration, $migration);
    }

}