[Boost-users] [GRAPH]write_graphviz and setS edges

Hi, I'd like to use the simple write_graphviz function write_graphviz(std::cout,g); but since my graph doesn't allow multiple edges between two vertices, the graph type is defined by : typedef adjacency_list <listS,setS, directedS,...>Graph; but then I can't use the write_graphviz function anymore (compilation error). If I declare my graph with typedef adjacency_list <listS,vecS, directedS,...>Graph; it is fine, but have multiple edges... So my question is : is there a way to use write_graphviz with the setS edges representation ? Thank you, Matthieu