void slist_free PARAMS ((slist *));
void string_set_add PARAMS ((struct hash_table *, const char *));
-int string_set_exists PARAMS ((struct hash_table *, const char *));
+int string_set_contains PARAMS ((struct hash_table *, const char *));
void string_set_free PARAMS ((struct hash_table *));
void free_keys_and_values PARAMS ((struct hash_table *));