Returns the corresponding gobject.TypeInterface structure of the parent type
of the instance type to which g_iface belongs. This is useful when
deriving the implementation of an interface from the parent type and
then possibly overriding some methods.
the
corresponding gobject.TypeInterface structure of the parent type of the
instance type to which g_iface belongs, or NULL if the parent
type doesn't conform to the interface
Returns the corresponding gobject.TypeInterface structure of the parent type of the instance type to which g_iface belongs. This is useful when deriving the implementation of an interface from the parent type and then possibly overriding some methods.