xbt_graph_t ret = xbt_graph_new_graph (0, NULL);
xbt_dict_t nodes = xbt_dict_new_homogeneous(NULL);
xbt_dict_t edges = xbt_dict_new_homogeneous(NULL);
xbt_graph_t ret = xbt_graph_new_graph (0, NULL);
xbt_dict_t nodes = xbt_dict_new_homogeneous(NULL);
xbt_dict_t edges = xbt_dict_new_homogeneous(NULL);