Parameter points to an array of items.
Generics and defining elements of containers and arrays.
NULL must not be passed as the value in, out, in-out; or as a return value.
NULL may be passed as the value in, out, in-out; or as a return value.
Parameter for returning results. Default is transfer full.
Exposed in C code, not necessarily available in other languages.
The caller owns the data, and is responsible for free it.
The data is owned by the callee, which is responsible of freeing it.