public function getItems()
    {
        if ($this->items === null) {
            $fusionContext = $this->runtime->getCurrentContext();
            $this->currentNode = isset($fusionContext['activeNode']) ? $fusionContext['activeNode'] : $fusionContext['documentNode'];
            $this->currentLevel = 1;
            $this->items = $this->buildItems();
        }

        return $this->items;
    }