void dict_reorder_vars (struct dictionary *,
struct variable *const *, size_t count);
void dict_reorder_vars (struct dictionary *,
struct variable *const *, size_t count);
void dict_rename_var (struct dictionary *, struct variable *, const char *);
bool dict_rename_vars (struct dictionary *,
struct variable **, char **new_names,
size_t count, char **err_name);
void dict_rename_var (struct dictionary *, struct variable *, const char *);
bool dict_rename_vars (struct dictionary *,
struct variable **, char **new_names,
size_t count, char **err_name);