If the attribute_types field is set by a derived class, then the a
#GckEnumerator which has been setup using [methodEnumerator.set_object_type]
with this derived type will retrieve these attributes when enumerating. In
this case the class must implement an 'attributes' property of boxed type
GCK_TYPE_ATTRIBUTES.
The class for a [class
Object].If the
attribute_typesfield is set by a derived class, then the a #GckEnumerator which has been setup using [methodEnumerator.set_object_type] with this derived type will retrieve these attributes when enumerating. In this case the class must implement an 'attributes' property of boxed typeGCK_TYPE_ATTRIBUTES.