NULL is OK, both for passing and for returning.
Parameter points to an array of items.
Generics and defining elements of containers and arrays.
Parameter for returning results. Default is transfer full.
Exposed in C code, not necessarily available in other languages.
Free data container after the code is done.
Alias for transfer none, used for objects with floating refs.
Free data after the code is done.
Don't free data after the code is done.
Override the parsed C type with given type.