Adds @interface_type to the static @instantiable_type. The information contained in the #GInterfaceInfo structure pointed to by @info is used to manage the relationship.
#GType value of an instantiable type
#GType value of an interface type
#GInterfaceInfo structure for this (@instance_type, @interface_type) combination
See Implementation
Adds @interface_type to the static @instantiable_type. The information contained in the #GInterfaceInfo structure pointed to by @info is used to manage the relationship.