- const char *(*argument)(void *data, const char *name);
- int (*is_argument_file)(void *data, const char *name);
- int (*iterate_arguments)(void *data, int (*iterator)(void *closure, const char *key, const char *value, int isfile), void *closure);
+ struct afb_arg (*get)(void *data, const char *name);
+ void (*iterate)(void *data, int (*iterator)(void *closure, struct afb_arg arg), void *closure);