/* Common ways to access variables. */
struct variable *dict_lookup_var (const struct dictionary *, const char *);
struct variable *dict_lookup_var_assert (const struct dictionary *,
const char *);
struct variable *dict_get_var (const struct dictionary *, size_t position);
/* Common ways to access variables. */
struct variable *dict_lookup_var (const struct dictionary *, const char *);
struct variable *dict_lookup_var_assert (const struct dictionary *,
const char *);
struct variable *dict_get_var (const struct dictionary *, size_t position);