A
allow-none
NULL is OK, both for passing and for returning.
array
Parameter points to an array of items.
E
element-type
Generics and defining elements of containers and arrays.
N
nullable
NULL may be passed as the value in, out, in-out; or as a return value.
O
optional
NULL may be passed instead of a pointer to a location.
out
Parameter for returning results. Default is transfer full.
S
skip
Exposed in C code, not necessarily available in other languages.
T
transfer full
Free data after the code is done.
transfer none
Don't free data after the code is done.
type
Override the parsed C type with given type.
V
virtual
This is the invoker for a virtual method.