void dict_delete_var (struct dictionary *, struct variable *);
void dict_delete_vars (struct dictionary *,
struct variable *const *, size_t count);
+void dict_delete_consecutive_vars (struct dictionary *d,
+ size_t idx, size_t count);
void dict_delete_scratch_vars (struct dictionary *);
void dict_reorder_var (struct dictionary *d, struct variable *v,
size_t new_index);