Store and retrieve nodes by address

Hi there,

Is it possible to retrieve a node address (path) in visitor class callback methods? I'd like to re-access nodes with cached data.

I'm looking for something like $node->address in the code below. I know such a property does not exist.

class MyNodeAddressCollectionVisitor extends NodeVisitorAbstract
{
    public function leaveNode(Node $node) {

        $nodeAddress = $node->address;

    }
}

Also I'm looking for a way to retrieve a node object by specifying its address,

    $node = $stmts->getNode($nodeAddress);

The request centers on NodeVisitorAbstract callback methods, especially leaveNode(), and the statement collection represented by $stmts. Start by tracing how visitor callbacks receive Node objects and how statement nodes are stored; done would provide a defined way to obtain node addresses and retrieve nodes from those addresses.