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This parameter is a 'user_data', for callbacks; many bindings can pass NULL here.
The callback is valid only during the call to the method.
Don't free data after the code is done.
Parameter for input and for returning results. Default is transfer full.
Out parameter, where caller must allocate storage.
Free data container after the code is done.
Free data after the code is done.
Generics and defining elements of containers and arrays.
Parameter for returning results. Default is transfer full.
Parameter for input. Default is transfer none.
NULL is ok, both for passing and for returning.
Override the parsed C type with given type.
The callback is valid until first called.
Parameter points to an array of items.