yii\rbac\DbManager::getChildrenRecursive PHP Method

    protected function getChildrenRecursive($name, $childrenList, &$result)
    {
        if (isset($childrenList[$name])) {
            foreach ($childrenList[$name] as $child) {
                $result[$child] = true;
                $this->getChildrenRecursive($child, $childrenList, $result);
            }
        }
    }