/** * @see Tx_PtExtbase_Tree_TreeWalkerVisitorInterface::doFirstVisit() * * @param Tx_PtExtbase_Tree_NodeInterface $node * @param integer &$index Holds the visitation index of treewalker * @param integer &$level Holds level of visitation in tree, starting at 1 */ public function doFirstVisit(Tx_PtExtbase_Tree_NodeInterface $node, &$index, &$level) { $node->setLft($index); }