obstack_init(&ob);
edges = new_set(compare_edge_t, 8);
/* get all affinity neighbours */
n_nodes = 0;
co_gs_foreach_neighb(aff, nbr) {
obstack_init(&ob);
edges = new_set(compare_edge_t, 8);
/* get all affinity neighbours */
n_nodes = 0;
co_gs_foreach_neighb(aff, nbr) {