A callback function used by the type system to finalize an interface.
This function should destroy any internal data and release any resources allocated by the corresponding GInterfaceInitFunc() function.
The interface structure to finalize
The interface_data supplied via the #GInterfaceInfo structure
interface_data
A callback function used by the type system to finalize an interface.
This function should destroy any internal data and release any resources allocated by the corresponding GInterfaceInitFunc() function.