+// ========== RoutingEdge ============
+DEFINE_EXTERNAL_CLASS(RoutingEdge);
+XBT_PUBLIC(RoutingEdge*) sg_host_edge(sg_host_t host);
+XBT_PUBLIC(void) sg_host_edge_set(sg_host_t host, RoutingEdge* edge);
+XBT_PUBLIC(void) sg_host_edge_destroy(sg_host_t host, int do_callback);
+