size_t dict_get_var_cnt (const struct dictionary *);
struct variable *dict_get_var (const struct dictionary *, size_t idx);
void dict_get_vars (const struct dictionary *,
size_t dict_get_var_cnt (const struct dictionary *);
struct variable *dict_get_var (const struct dictionary *, size_t idx);
void dict_get_vars (const struct dictionary *,