for (TransferNode tree : trees) {
TPState pathState = TPState.end(queryData, tree);
Vertex fromVertex = new TPArrivalVertex(_context, pathState);
Vertex toVertex = new WalkFromStopVertex(_context, _stop);
EdgeNarrative narrative = narrative(s0, fromVertex, toVertex);
State r = s0.edit(this, narrative).makeState();
results = r.addToExistingResultChain(results);