Acl\AclExtras::_cleaner PHP Method

    protected function _cleaner($parentId, $preservedItems = [])
    {
        $nodes = $this->Aco->find()->where(['parent_id' => $parentId]);
        $methodFlip = array_flip($preservedItems);
        foreach ($nodes as $node) {
            if (!isset($methodFlip[$node->alias])) {
                $crumbs = $this->Aco->find('path', ['for' => $node->id, 'order' => 'lft']);
                $path = null;
                foreach ($crumbs as $crumb) {
                    $path .= '/' . $crumb->alias;
                }
                $entity = $this->Aco->get($node->id);
                if ($this->Aco->delete($entity)) {
                    $this->out(__d('cake_acl', 'Deleted Aco node: <warning>{0}</warning> and all children', $path));
                }
            }
        }
    }