[hibernate-dev] [OGM] When is AssociationKey serialized?

Hi, I'm wondering why org.hibernate.ogm.grid.AssociationKey implements Serializable. When is it actually serialized? I'm suspecting the answer is "never", as the type of the "metadata" member is not serializable, so I'd expect a NotSerializableException to be raised. If so, does anything speak against making AssociationKey not implement Serializable? Thanks, --Gunnar