[Boost-users] Dijkstra Visitor - Accessing the priority queue

Good morning, I'm trying to make a single pair shortest path function using the goal-directed search technique based on dijkstra_shortest_paths and Visitors. In some point when the target vertex is processed, I would like to exit dijkstra_shortest_paths.To do that I 'm thinking trying to empty the priority queue. Can I access the priority queue inside a visitor using something like an extern declaration, since none of the Dijkstra Visitor's methods gets the priority queue as an argument ? With regards, Jonas Gabriel