public function &getNode(/*# string */ $nodeName)
    {
        if ('' === $nodeName) {
            $result = &$this->tree;
        } else {
            $result = &$this->searchNode($nodeName, $this->tree, false);
        }
        return $result;
    }
public function &getNode(/*# string */ $nodeName)
    {
        if ('' === $nodeName) {
            $result = &$this->tree;
        } else {
            $result = &$this->searchNode($nodeName, $this->tree, false);
        }
        return $result;
    }
{@inheritDoc}