n.                              #ifdef debug                             cerr << "\t\tContain edge " << graph->get_id(inbound) << (graph->get_is_reverse(inbound) ? "-" : "+") << endl; #endif                                                          begin_chain(inbound);                             end_chain(inbound);                                                          visited.insert(graph->forward(inbound));                         }                     });                 } else {                     // 