const size_t group_var_width = var_get_width (nst->indep_var);
struct rank_entry *rank = find_rank_entry (&kw[i].map, group, group_var_width);
const size_t group_var_width = var_get_width (nst->indep_var);
struct rank_entry *rank = find_rank_entry (&kw[i].map, group, group_var_width);