StackFormation\Command\Stack\TreeCommand::prepareTree PHP Метод

    protected function prepareTree(array $arr)
    {
        $tree = [];
        foreach ($arr as $a) {
            $name = $a->getName();
            $cur =& $tree;
            foreach (explode("-", $name) as $e) {
                if (empty($cur[$e])) {
                    $cur[$e] = [];
                }
                $cur =& $cur[$e];
            }
        }
        return $tree;
    }